Remove the logic from how to run tests in gate
Remove the logic from how to run tests in gate

This will be handled in run_tests.sh instead for increased
flexibility.

Change-Id: I2b7394f02c01a9c51587ae513783f557f89b7883

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