[sahara-tests] create and merge, disable tests

These _temporary_ changes should allow sahara-tests-release to:
- create a new, orphan branch where to push a series of (imported)
  commits from another repositories;
- push a merge commit from the said orphan branch to master for proper
  review;
- disable the tests from being executed (exception: the required basic
  tests).

The first draft of the complete plan was outlined here:
http://lists.openstack.org/pipermail/openstack-dev/2016-March/089929.html

Change-Id: I72b8e0b777573fb8249c052ecfbfd213bcc87a93

gerrit/acls/openstack/sahara-tests.config

@@ -1,5 +1,9 @@
+[access "refs/for/refs/*"]
+pushMerge = group sahara-tests-release
+
 [access "refs/heads/*"]
 abandon = group sahara-tests-core
+create = group sahara-tests-release
 label-Code-Review = -2..+2 group sahara-tests-core
 label-Verified = -1..+1 group sahara-ci
 label-Workflow = -1..+1 group sahara-tests-core

zuul/layout.yaml

@@ -10344,18 +10344,20 @@ projects:
   - name: openstack/sahara-tests
     template:
       - name: merge-check
-      - name: python-jobs
+      - name: noop-jobs
-      - name: check-requirements
+#      - name: python-jobs
-    check:
+#      - name: check-requirements
-      - gate-sahara-tests-pylint
+#    check:
-      - gate-sahara-tests-python34
+#       - gate
-      - gate-sahara-tests-dsvm-scenario-neutron-heat
+#      - gate-sahara-tests-pylint
-      - gate-sahara-tests-dsvm-scenario-nova-heat
+#      - gate-sahara-tests-python34
-    gate:
+#      - gate-sahara-tests-dsvm-scenario-neutron-heat
-      - gate-sahara-tests-dsvm-scenario-neutron-heat
+#      - gate-sahara-tests-dsvm-scenario-nova-heat
-      - gate-sahara-tests-dsvm-scenario-nova-heat
+#    gate:
-    post:
+#      - gate-sahara-tests-dsvm-scenario-neutron-heat
-      - sahara-tests-coverage
+#      - gate-sahara-tests-dsvm-scenario-nova-heat
+#    post:
+#      - sahara-tests-coverage
 
   - name: openstack/salt-formula-ceilometer
     template: