Fix NetAppCmodeISCSIDriver._get_lun_handle() method
Fix NetAppCmodeISCSIDriver._get_lun_handle() method

bug 1055578

Change-Id: I06da6a9a59fa2320f1cae9698e5e63562e534916
(cherry picked from commit e576eb31684e66dee792e334024d68bb63cba024)

paulmathews/nova,NewpTone/stacklab-nova,NewpTone/stacklab-nova,paulmathews/nova,NewpTone/stacklab-nova,paulmathews/nova,savi-dev/nova,savi-dev/nova,savi-dev/nova