toaster: projecttopbar Use the project in context to get num builds

Use the project in the template context rather than ajax request to get
the number of ended builds.

Signed-off-by: Michael Wood <michael.g.wood@intel.com>
Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

lib/toaster/toastergui/templates/projecttopbar.html

@@ -28,7 +28,7 @@ <h1 id="project-name-container">
     <ul class="nav nav-pills">
       <li>
         <a href="{% url 'projectbuilds' project.id %}">
-          Builds (<span class="total-builds">0</span>)
+          Builds ({{project.get_number_of_builds}})
         </a>
       </li>
       <li id="topbar-configuration-tab">