Fix ISCSIDriver initialized connection volume type
Fix ISCSIDriver initialized connection volume type

ISCSIDriver initialize connection is a duplicated function
left in kilo to serve drivers that don't use the new targets model.

In Kilo there is a new parameter of iscsi_protocol, that is set to
iscsi by default and can be changed to iser in order to enable RDMA.

In order support RDMA in drivers that still inherit from ISCSIDriver,
driver_volume_type should be set to iscsi_protocol parameter value
instead of a hard coded value until this function duplication will be solved.

Closes-Bug: #1438833

Change-Id: If51ff933b75bf475c779d2599776f8a83acc08e5

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