Don't run dsvm on ironic api-ref changes
Don't run dsvm on ironic api-ref changes

api-ref/ is just another doc tree, don't run the dsvm tests when changes
are only made to this directory.

Change-Id: Icea7bbf74b3e53ea29c82143b4ee624759cb96a5

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