Update stackforge/tuskar-ui-extras to run tests on the gate

This patch does two things for tuskar-ui-extras:
* removes the outdated upstream repository information
* enables running of the python test, pep8 jobs

Change-Id: Ie61321816d619ec396fd6ea0eaa4a595447eabb3

gerrit/projects.yaml

@@ -1819,7 +1819,6 @@
   upstream: git://github.com/rcbau/turbo-hipster.git
 - project: stackforge/tuskar-ui-extras
   description: Additional plugins for Tuskar-UI.
-  upstream: https://github.com/jsomara/tuskar-ui-sat6
 - project: stackforge/vmware-nsx
   description: A set of Neutron drivers for the VMware NSX.
   upstream: https://github.com/gkotton/vmware-nsx.git

zuul/layout.yaml

@@ -5721,7 +5721,14 @@ projects:
   - name: stackforge/tuskar-ui-extras
     template:
       - name: merge-check
-      - name: noop-jobs
+    check:
+      - gate-tuskar-ui-extras-pep8
+      - gate-tuskar-ui-extras-python27
+    gate:
+      - gate-tuskar-ui-extras-pep8
+      - gate-tuskar-ui-extras-python27
+    post:
+      - tuskar-ui-extras-branch-tarball
 
   - name: stackforge/vmware-nsx
     template: