dib: run feature/v2 on trusty too
Since the nodepool builders are trusty, we have this as a target
platform.  Unfortunately we were not testing trusty on feature/v2.  I
went to merge that branch back into master thinking it was ready, and
guess what doesn't work :)
@@ -1216,7 +1216,7 @@ jobs:
# Make sure we run ubuntu-trusty tests for diskimage-builder at
# least while nodepool is a trusty host.
- name: ^gate-dib-dsvm-functests-ubuntu-trusty.*$
- branch: master
+ branch: (master|feature/v2)
- name: ^gate-logstash-filters-ubuntu-xenial$
voting: false
