Don't run dsvm tests on rst/unit test changes
Don't run dsvm tests on rst/unit test changes

If the change is only for rst file or unit test on tempest-lib, don't
run the dsvm changes for avoiding much test operation time.

Change-Id: I8797171640f05c2b04c4299fa2c05ba25684e2de

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