Fix add enclosure example
Fix add enclosure example

Fix example add enclosure script that can fail when you have more
then one enclosure group.

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