create a test that removes a RequiresReplace path

One of the paths that triggers RequiresReplace does not apply to the
new value.

builtin/providers/test/resource_list.go

@@ -25,6 +25,11 @@ func testResourceList() *schema.Resource {
 							Type:     schema.TypeInt,
 							Optional: true,
 						},
+						"force_new": {
+							Type:     schema.TypeString,
+							Optional: true,
+							ForceNew: true,
+						},
 						"sublist_block": {
 							Type:     schema.TypeList,
 							Optional: true,

builtin/providers/test/resource_list_test.go

@@ -188,3 +188,33 @@ resource "test_resource_list" "bar" {
 		},
 	})
 }
+
+func TestResourceList_removedForcesNew(t *testing.T) {
+	resource.UnitTest(t, resource.TestCase{
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckResourceDestroy,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				Config: strings.TrimSpace(`
+resource "test_resource_list" "foo" {
+	list_block {
+		force_new = "ok"
+	}
+}
+				`),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr(
+						"test_resource_list.foo", "list_block.0.force_new", "ok",
+					),
+				),
+			},
+			resource.TestStep{
+				Config: strings.TrimSpace(`
+resource "test_resource_list" "foo" {
+}
+				`),
+				Check: resource.ComposeTestCheckFunc(),
+			},
+		},
+	})
+}