Use zuul-cloner for coverage job
Use zuul-cloner for coverage job

Limited testing has shown that the updated zuul-cloner works with
constraints in the post queue. Enable zuul-cloner with constraints now
for all coverage job to widen testing.

Change-Id: I2c0fb1e9b5a51be409687d9cb85ee3ae70c1ce94

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