Trim 5s+ from storwize unit tests

Trim 5s+ from storwize unit tests

The test test_run_ssh_fail_to_secondary_ip test case in the StorWize
Driver does a greenthread.sleep(random.randint()) inside a retry loop.
Its execution time often approaches 5s.

This commit mocks random.randint() in this test so that the
greenthread.sleep() duration is always zero, reducing execution time for
the test to under half a second.

The various test_storwize_consistency_group* tests trigger
FixedIntervalLoopingCalls.  Mocking them with ZeroIntervalLoopingCalls
reduces their total execution time from about 8s to under 3s.

We also fix the fake user and project ids in this file so that
it no longer emits FutureWarnings from oslo.versionedobjects about
invalid uuids as documented here [1].

[1] http://docs.openstack.org/developer/oslo.versionedobjects/api/fields.html#oslo_versionedobjects.fields.UUIDField

Change-Id: I05dc3c4a5a886ce323430055f34d6c578c0f4443