[SCSI] be2iscsi: Get Initiator Name for the iSCSI_Host

Implement the ISCSI_HOST_PARAM_INITIATOR_NAME for .get_host_param

Signed-off-by: John Soni Jose <sony.john-n@emulex.com>
Signed-off-by: Jayamohan Kallickal <jayamohan.kallickal@emulex.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>