Policy update for volume v2 qos-specs RBAC tests

Now that Cinder has added policy granularity to qos-specs API [0],
some of the policies in the qos-specs RBAC tests are incorrect.
Policy actions that are named volume_extension:qos_specs_manage:read
need to be changed to volume_extension:qos_specs_manage:get
and volume_extension:qos_specs_manage:get_all (for show and list)
actions respectively.

[0] I1ca996e968a273b989bea0bf3c54b47349ca47fe

Change-Id: I5b732e514f626b3d77bedb721ec24e98b59116e9
Depends-On: I1ca996e968a273b989bea0bf3c54b47349ca47fe
1 file changed