Speedup solidfire unit tests

The SolidFire driver has a sleep that's used in a retry loop.  This
sleep was being called every iteration of the loop though
(instead of just when the call failed).

This made SolidFire the slowest test in the unit tests, and obviously
it's just stupid anyway.  So this change fixes that and only performs
the sleep if the call actually failed.

Change-Id: I560f2fdb6bf16a6a9b26184234225349ab62e816
Add missing processutils for impl_zmq in oslo rpc

impl_zmq in oslo rpc requires processutils.

Change-Id: Ib2f114a9e78af6d2acdab34c8c787df8abdb967a
Update Cinder's latest copy of OSLO grizzly stable

This patch updates all the files from oslo under
stable/grizzly but policy.py.  policy.py is a high risk
change at this date and it has lots of changes since the
last time we updated it.

Fixes bug #1157126

Change-Id: I399a1cd8474f718ed5196def90d2fea546fb01f5
Fetch volume_types by uuid and not by name in v2

Change-Id: I02cc035565f9496cd5af228c55ced5cafef2ad81
Fixes: bug #1087817