FIX: Use new tag routes (#8683)

Commit 1fb7a62 added unambiguous routes for tags. This commit ensures
that the new routes are used.

test/javascripts/acceptance/search-test.js.es6

@@ -50,7 +50,7 @@ QUnit.test("search for a tag", async assert => {
 });
 
 QUnit.test("search scope checkbox", async assert => {
-  await visit("/tags/important");
+  await visit("/tag/important");
   await click("#search-button");
   assert.ok(
     exists(".search-context input:checked"),

test/javascripts/acceptance/tag-hashtag-test.js.es6

@@ -6,7 +6,7 @@ acceptance("Tag Hashtag", {
   pretend(server, helper) {
     server.get("/tags/check", () => {
       return helper.response({
-        valid: [{ value: "monkey", url: "/tags/monkey" }]
+        valid: [{ value: "monkey", url: "/tag/monkey" }]
       });
     });
   }
@@ -22,6 +22,6 @@ QUnit.test("tag is cooked properly", async assert => {
     find(".d-editor-preview:visible")
       .html()
       .trim(),
-    '<p>this is a tag hashtag <a href="/tags/monkey" class="hashtag">#<span>monkey</span></a></p>'
+    '<p>this is a tag hashtag <a href="/tag/monkey" class="hashtag">#<span>monkey</span></a></p>'
   );
 });

test/javascripts/acceptance/tags-intersection-test.js.es6

@@ -5,7 +5,7 @@ acceptance("Tags intersection", {
   site: { can_tag_topics: true },
   settings: { tagging_enabled: true },
   pretend(server, helper) {
-    server.get("/tags/first/notifications", () => {
+    server.get("/tag/first/notifications", () => {
       return helper.response({
         tag_notification: { id: "first", notification_level: 1 }
       });

test/javascripts/acceptance/tags-test.js.es6

@@ -91,7 +91,7 @@ QUnit.test("list the tags in groups", async assert => {
       .map(i => {
         return $(i).attr("href");
       }),
-    ["/tags/focus", "/tags/escort"],
+    ["/tag/focus", "/tag/escort"],
     "always uses lowercase URLs for mixed case tags"
   );
   assert.equal(
@@ -103,13 +103,13 @@ QUnit.test("list the tags in groups", async assert => {
 
 test("new topic button is not available for staff-only tags", async assert => {
   /* global server */
-  server.get("/tags/regular-tag/notifications", () => [
+  server.get("/tag/regular-tag/notifications", () => [
     200,
     { "Content-Type": "application/json" },
     { tag_notification: { id: "regular-tag", notification_level: 1 } }
   ]);
 
-  server.get("/tags/regular-tag/l/latest.json", () => [
+  server.get("/tag/regular-tag/l/latest.json", () => [
     200,
     { "Content-Type": "application/json" },
     {
@@ -133,13 +133,13 @@ test("new topic button is not available for staff-only tags", async assert => {
     }
   ]);
 
-  server.get("/tags/staff-only-tag/notifications", () => [
+  server.get("/tag/staff-only-tag/notifications", () => [
     200,
     { "Content-Type": "application/json" },
     { tag_notification: { id: "staff-only-tag", notification_level: 1 } }
   ]);
 
-  server.get("/tags/staff-only-tag/l/latest.json", () => [
+  server.get("/tag/staff-only-tag/l/latest.json", () => [
     200,
     { "Content-Type": "application/json" },
     {
@@ -166,18 +166,18 @@ test("new topic button is not available for staff-only tags", async assert => {
 
   updateCurrentUser({ moderator: false, admin: false });
 
-  await visit("/tags/regular-tag");
+  await visit("/tag/regular-tag");
   assert.ok(find("#create-topic:disabled").length === 0);
 
-  await visit("/tags/staff-only-tag");
+  await visit("/tag/staff-only-tag");
   assert.ok(find("#create-topic:disabled").length === 1);
 
   updateCurrentUser({ moderator: true });
 
-  await visit("/tags/regular-tag");
+  await visit("/tag/regular-tag");
   assert.ok(find("#create-topic:disabled").length === 0);
 
-  await visit("/tags/staff-only-tag");
+  await visit("/tag/staff-only-tag");
   assert.ok(find("#create-topic:disabled").length === 0);
 });
 
@@ -187,13 +187,13 @@ acceptance("Tag info", {
     tags_listed_by_group: true
   },
   pretend(server, helper) {
-    server.get("/tags/planters/notifications", () => {
+    server.get("/tag/planters/notifications", () => {
       return helper.response({
         tag_notification: { id: "planters", notification_level: 1 }
       });
     });
 
-    server.get("/tags/planters/l/latest.json", () => {
+    server.get("/tag/planters/l/latest.json", () => {
       return helper.response({
         users: [],
         primary_groups: [],
@@ -215,7 +215,7 @@ acceptance("Tag info", {
       });
     });
 
-    server.get("/tags/planters/info", () => {
+    server.get("/tag/planters/info", () => {
       return helper.response({
         __rest_serializer: "1",
         tag_info: {
@@ -261,7 +261,7 @@ acceptance("Tag info", {
 test("tag info can show synonyms", async assert => {
   updateCurrentUser({ moderator: false, admin: false });
 
-  await visit("/tags/planters");
+  await visit("/tag/planters");
   assert.ok(find("#show-tag-info").length === 1);
 
   await click("#show-tag-info");
@@ -286,7 +286,7 @@ test("tag info can show synonyms", async assert => {
 });
 
 test("admin can manage tags", async assert => {
-  server.delete("/tags/planters/synonyms/containers", () => [
+  server.delete("/tag/planters/synonyms/containers", () => [
     200,
     { "Content-Type": "application/json" },
     { success: true }
@@ -294,7 +294,7 @@ test("admin can manage tags", async assert => {
 
   updateCurrentUser({ moderator: false, admin: true });
 
-  await visit("/tags/planters");
+  await visit("/tag/planters");
   assert.ok(find("#show-tag-info").length === 1);
 
   await click("#show-tag-info");

test/javascripts/components/tag-drop-test.js.es6

@@ -71,7 +71,7 @@ componentTest("default", {
     await this.subject.fillInFilter("dav");
     await this.subject.keyboard("enter");
     assert.ok(
-      DiscourseURL.routeTo.calledWith("/tags/david"),
+      DiscourseURL.routeTo.calledWith("/tag/david"),
       "it uses lowercase URLs for tags"
     );
   }
@@ -107,7 +107,7 @@ componentTest("synonym", {
     await this.subject.fillInFilter("robin");
     await this.subject.keyboard("enter");
     assert.ok(
-      DiscourseURL.routeTo.calledWith("/tags/eviltrout"),
+      DiscourseURL.routeTo.calledWith("/tag/eviltrout"),
       "it routes to the target tag"
     );
   }

test/javascripts/fixtures/discovery_fixtures.js.es6

@@ -3756,7 +3756,7 @@ export default {
       ]
     }
   },
-  "/tags/important/l/latest.json": {
+  "/tag/important/l/latest.json": {
     users: [{ id: 1, username: "sam", avatar_template: "/images/avatar.png" }],
     primary_groups: [],
     topic_list: {