Add build post commit hook to run tests

openshift/templates/django-postgresql.json

@@ -106,7 +106,10 @@
               "secret": "${GITHUB_WEBHOOK_SECRET}"
             }
           }
-        ]
+        ],
+        "postCommit": {
+           "script": "./manage.py test"
+        }
       }
     },
     {

openshift/templates/django.json

@@ -106,7 +106,10 @@
               "secret": "${GITHUB_WEBHOOK_SECRET}"
             }
           }
-        ]
+        ],
+        "postCommit": {
+          "script": "./manage.py test"
+        }
       }
     },
     {