Use ubuntu-trusty for releasenotes jobs
Use ubuntu-trusty for releasenotes jobs

Convert releasenotes jobs to use ubuntu-trusty instead of bare-trusty.

Change-Id: I09c0bf11af6324c91195fc9cda2cdb8308a56162

Tesora/tesora-project-config,dongwenjuan/project-config,noorul/os-project-config,Tesora/tesora-project-config,dongwenjuan/project-config,openstack-infra/project-config,noorul/os-project-config,openstack-infra/project-config