bitbake: toaster: added covered task list

if a task has a 'covered' indication, the list of tasks that
covered the task are computed and displayed. amended to add tooltip.

[YOCTO #5925]

(Bitbake rev: bb05ee13f53f10988579b6238802327732041d0c)

Signed-off-by: Farrell Wymore <farrell.wymore@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastergui/templates/task.html

@@ -109,7 +109,16 @@
             </dt>
             <dd>
                 <ul>
-                    <li><p class="alert-info">TODO:Covering tasks will be displayed here</p></li>
+                  {% for t in covered_by %}
+                    <li>
+                      <a href="{%url 'task' t.build.pk t.pk%}"
+                         class="task-info"
+                        title="{{t.get_executed_display}} | {{t.get_outcome_display}}">
+                        {{t.recipe.name}}_{{t.recipe.version}}
+                        {{t.task_name}}
+                      </a>
+                    </li>
+                  {% endfor %}
                 </ul>
             </dd>
         </dl>