SONAR-7846 do not display both message and stacktrace

it/it-tests/src/test/java/it/projectAdministration/BackgroundTasksTest.java

@@ -71,7 +71,7 @@ public class BackgroundTasksTest {
   }
 
   @Test
-  public void display_error_message_and_stacktrace() {
+  public void display_error_stacktrace() {
     executeBuild("test-project", "Test Project", "2010-01-01");
 
     nav.logIn().submitCredentials("admin", "admin");
@@ -81,7 +81,6 @@ public class BackgroundTasksTest {
     BackgroundTaskItem task = page.getTasksAsItems().get(0);
     task.openActions()
       .openErrorStacktrace()
-      .assertErrorMessageContains("Date of analysis cannot be older than the date of the last known analysis")
       .assertErrorStacktraceContains("Date of analysis cannot be older than the date of the last known analysis");
   }
 

it/it-tests/src/test/java/pageobjects/BackgroundTaskItem.java

@@ -56,12 +56,7 @@ public class BackgroundTaskItem {
 
   public BackgroundTaskItem openErrorStacktrace () {
     elt.$(".js-task-show-stacktrace").click();
-    $(".js-task-error-message").shouldBe(visible);
-    return this;
-  }
-
-  public BackgroundTaskItem assertErrorMessageContains(String text) {
-    $(".js-task-error-message").should(hasText(text));
+    $(".js-task-stacktrace").shouldBe(visible);
     return this;
   }
 

server/sonar-web/src/main/js/apps/background-tasks/views/StacktraceView.hbs

@@ -6,12 +6,12 @@
     <div class="js-modal-messages"></div>
 
     {{#if loaded}}
-      <h4 class="spacer-bottom">{{t 'background_tasks.error_message'}}</h4>
-      <pre class="js-task-error-message">{{task.errorMessage}}</pre>
-
       {{#if stacktrace}}
-        <h4 class="huge-spacer-top spacer-bottom">{{t 'background_tasks.error_stacktrace'}}</h4>
+        <h4 class="spacer-bottom">{{t 'background_tasks.error_stacktrace'}}</h4>
         <pre class="js-task-stacktrace">{{stacktrace}}</pre>
+      {{else}}
+        <h4 class="spacer-bottom">{{t 'background_tasks.error_message'}}</h4>
+        <pre class="js-task-error-message">{{task.errorMessage}}</pre>
       {{/if}}
     {{else}}
       <i class="spinner"></i>