Make gate-manila-ui-dsvm-nv job run only for Ocata+ branches
Make gate-manila-ui-dsvm-nv job run only for Ocata+ branches

Job 'gate-manila-ui-dsvm-nv' depends on code merged in Ocata (current
master) [1]. So, exclude this job from all existing stable branches
to avoid redundant waste of CI resources.

[1] Id564e4ea6b675aa197ae377aa7a756e1bd0625b6

Change-Id: I2c17c431662c4212dceae1a831f80938c589ad33

Tesora/tesora-project-config,openstack-infra/project-config,openstack-infra/project-config,Tesora/tesora-project-config