Make Horizon Integration Tests voting
Make Horizon Integration Tests voting

Horizon integration tests have been stable for a while now. We should
make them voting.

Change-Id: Iaff521c92beb4996f8de8b9873a12a56c4cfce79

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