FIX: improves reports resilience (#6239)

This commit makes most of the reports now lazy loaded, and making them benefits from graceful failures.

test/javascripts/fixtures/flags.js.es6

@@ -0,0 +1,7 @@
+export default {
+  "/admin/reports/flags": {
+    report: {
+      report_key: "flags"
+    }
+  }
+};

test/javascripts/fixtures/likes.js.es6

@@ -0,0 +1,7 @@
+export default {
+  "/admin/reports/likes": {
+    report: {
+      report_key: "likes"
+    }
+  }
+};

test/javascripts/fixtures/page_view_total_reqs.js.es6

@@ -0,0 +1,7 @@
+export default {
+  "/admin/reports/page_view_total_reqs": {
+    report: {
+      report_key: "page_view_total_reqs"
+    }
+  }
+};

test/javascripts/fixtures/time_to_first_response.js.es6

@@ -0,0 +1,7 @@
+export default {
+  "/admin/reports/time_to_first_response": {
+    report: {
+      report_key: "time_to_first_response"
+    }
+  }
+};

test/javascripts/fixtures/user_to_user_private_messages_with_replies.js.es6

@@ -0,0 +1,7 @@
+export default {
+  "/admin/reports/user_to_user_private_messages_with_replies": {
+    report: {
+      report_key: "user_to_user_private_messages_with_replies"
+    }
+  }
+};

test/javascripts/fixtures/visits.js.es6

@@ -0,0 +1,7 @@
+export default {
+  "/admin/reports/visits": {
+    report: {
+      report_key: "posts"
+    }
+  }
+};