Removed tempest git entry
Removed tempest git entry

The tempest role has an entry within the defaults of the role and
it could cause confusion when dealing with tempest as the main
package version is being specified in
`vars/repo_packages/openstack_services.yml`. Being that these
variables are no longer used they have been removed.

Implements blueprint: master-kilofication
(cherry picked from commit bddfa51fce403d84dd9a2ae9f9fa1baf7f582dbc)


Change-Id: I197afac1ce50d9bad778dda5cc4a23a0821fceeb

VaneCloud/openstack-ansible,VaneCloud/openstack-ansible,yanyao/openstack-deployment,yanyao/openstack-deployment,yanyao/openstack-deployment,VaneCloud/openstack-ansible,yanyao/openstack-deployment