Fix incorrect comments in FibreChannelConnector
Fix incorrect comments in FibreChannelConnector

Since some comments in FibreChannelConnector
explain about iSCSI parameter, I fix it.

And some log messages are improved.

Change-Id: I199046ded9e819f655147e94a5f55ccac66001a0
Closes-Bug: #1481777

openstack/os-brick,openstack/os-brick