In this change, a charm test that subclasses the ManilaBaseTest
class can also opt-in to re-validating a share after restarting
the share services by overriding the _restart_share_instance
method.
The current Manila Ganesha `test_manila_share` had a lot of
functionality that can be re-used to any configured Manila backend.
It's a good idea to have this functionality generalized into
`zaza.manila.tests.ManilaBaseTest`, which can be reused for any
tested Manila backend.
The manila charm contains a 'band-aid' for Bug #1706699 which relies
on update-status to bring up services if needed. When the tests run
an update-status hook might not have run so services may still be
stopped so force a hook execution.
FrancescoDeSimone
Gustavo Sanchez
Chris MacNaughton
Ionut Balutoiu
Liam Young
Chris MacNaughton