Unbreak test_storwize_svc.py by setting storwize_svc_multihostmap_enabled

Fixes LP bug 1198146

Change-Id: Ia711457b9066d07458fd086df8b317c616f7baf9
Merge "Unbreak test_storwize_svc.py by setting storwize_svc_multihostmap_enabled" into stable/grizzly