Fix bug where a storage system can be added without a valid storage domain being specified.
Fix bug where a storage system can be added without a valid storage domain being
specified.

ufcg-lsd/python-hpOneView,miqui/python-hpOneView,HewlettPackard/python-hpOneView,andreadean5/python-hpOneView,HewlettPackard/python-hpOneView,danielreed/python-hpOneView