Since NVMET target driver will be implemented it would be good to use
the same config options both for NVMEoF and iSCSI targets. That's why
this path renames iscsi_ip_address, iscsi_port, iscsi_helper
iscsi_target_prefix, iscsi_protocol to target_ip_address, target_port,
target_helper, target_prefix, and target_protocol according to current
deprecation policy.
Change-Id: I5231f8fe3399deb9c57e6efb121d0d008dc9c7f4
Related-Blueprint: nvme-target-cli
4b092e8d9d