Don't run dsvm jobs on changes py3 ignored tests
Don't run dsvm jobs on changes py3 ignored tests

It is redundant to launch dsvm jobs on patches, which change only list
of ignored testcases on Python 3.

Change-Id: I37f801ff3c34ce1f3fa97e69708052dc3e49c9d8

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