Refactoring Manila GlusterFS job definitions
Refactoring Manila GlusterFS job definitions

This patch modifies the Manila GlusterFS job definitions to use
devstack-plugin-glusterfs plugin specific pre_test_hook.sh and
post_test_hook.sh scripts.

Change-Id: I3b285a7b7007e6017b174ad1fd69b5f4cbb2f202

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