Add Container experimental job for manila

New Container driver is under development for manila,
this commit provides an experimental job for testing it.

Change-Id: I73978cba8cae6f78f4c1db94bb793237a2a0a220

jenkins/jobs/projects.yaml

@@ -3082,6 +3082,13 @@
           back_end_type: 'multibackend'
           driver: 'zfsonlinux'
           test_type: 'api'
+      - 'gate-manila-tempest-dsvm-{description}':
+          description: postgres-container
+          postgres_enabled: '1'
+          dhss: '1'
+          back_end_type: 'multibackend'
+          driver: 'container'
+          test_type: 'api'
       - 'gate-manila-tempest-dsvm-{description}':
           description: generic-no-share-servers
           postgres_enabled: '0'

zuul/layout.yaml

@@ -2142,6 +2142,9 @@ jobs:
     branch: ^(?!stable/(?:kilo|liberty)).*$
     voting: false
 
+  - name: gate-manila-tempest-dsvm-postgres-container
+    voting: false
+
   - name: gate-grenade-dsvm-manila
     branch: ^(?!stable/(?:liberty|mitaka)).*$
     voting: false
@@ -7074,6 +7077,7 @@ projects:
       - gate-grenade-dsvm-manila
       - gate-rally-dsvm-manila-multibackend
       - gate-rally-dsvm-manila-multibackend-no-ss
+      - gate-manila-tempest-dsvm-postgres-container
 
   - name: openstack/manila-image-elements
     template: