Move Nova V2.1 job from experimental to check/gate
Move Nova V2.1 job from experimental to check/gate

To test Nova V2.1 API, V2.1 job was added as experimental job.
As all V2.1 tests pass successfully, it will be better to move
those in check/gate pipeline to maintain the stability of V2.1 API.

This patch moves Nova V2.1 job from experimental to check/gate pipeline.

Change-Id: I69eca1aef676c044e50b720cf511bbd88c053c40

Tesora/tesora-project-config,anbangr/osci-project-config,citrix-openstack/project-config,noorul/os-project-config,coolsvap/project-config,Tesora/tesora-project-config,dongwenjuan/project-config,noorul/os-project-config,coolsvap/project-config,anbangr/osci-project-config,openstack-infra/project-config,open-switch/infra_project-config,citrix-openstack/project-config,open-switch/infra_project-config,dongwenjuan/project-config,openstack-infra/project-config