Fixed data copy issue of volume/driver.py
Fixed data copy issue of volume/driver.py

I found data copy issue on __init__ of ISERDriver class.
Some settings for iser should be copied to iscsi's.
But iser_port value was copied not to iscsi_port but to iser_port.
This patch will fix this issue as to be copied to iscsi_port.

Change-Id: I7621e690396049aabf3ced331e633158f45067f4

dims/cinder,julianwang/cinder,Paul-Ezell/cinder-1,saeki-masaki/cinder,Hybrid-Cloud/cinder,Datera/cinder,blueboxgroup/cinder,tlakshman26/cinder-https-changes,Nexenta/cinder,Accelerite/cinder,JioCloud/cinder,potsmaster/cinder,rakeshmi/cinder,apporc/cinder,NetApp/cinder,eharney/cinder,bswartz/cinder,nikesh-mahalka/cinder,Nexenta/cinder,sasukeh/cinder,CloudServer/cinder,Datera/cinder,j-griffith/cinder,rakeshmi/cinder,takeshineshiro/cinder,takeshineshiro/cinder,scottdangelo/RemoveVolumeMangerLocks,duhzecca/cinder,openstack/cinder,mahak/cinder,mahak/cinder,bswartz/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,dims/cinder,manojhirway/ExistingImagesOnNFS,phenoxim/cinder,Akrog/cinder,hguemar/cinder,sasukeh/cinder,tlakshman26/cinder-https-changes,alex8866/cinder,Hybrid-Cloud/cinder,NetApp/cinder,potsmaster/cinder,ge0rgi/cinder,abusse/cinder,winndows/cinder,winndows/cinder,hguemar/cinder,manojhirway/ExistingImagesOnNFS,JioCloud/cinder,j-griffith/cinder,alex8866/cinder,cloudbase/cinder,cloudbase/cinder,abusse/cinder,apporc/cinder,redhat-openstack/cinder,Accelerite/cinder,tlakshman26/cinder-new-branch,Paul-Ezell/cinder-1,nexusriot/cinder,eharney/cinder,scality/cinder,julianwang/cinder,nexusriot/cinder,redhat-openstack/cinder,scality/cinder,scottdangelo/RemoveVolumeMangerLocks,Akrog/cinder,duhzecca/cinder,leilihh/cinder,tlakshman26/cinder-new-branch,CloudServer/cinder,github-borat/cinder,github-borat/cinder,blueboxgroup/cinder,phenoxim/cinder,nikesh-mahalka/cinder,leilihh/cinder,openstack/cinder,saeki-masaki/cinder,petrutlucian94/cinder,petrutlucian94/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full