Storwize/SVC can not get the right host

When only config FC host, Storwize/SVC driver can not get the host
by remote WWPNs except the first one.

Filter 'iscsi_name' and 'WWPN' from host information, if not configure
iSCSI port, only return the first WWPN.

Change-Id: I27852e49f5dfb3a94eed08bea0e5d81a9d7aef9c
Closes-Bug: #1343142
Merge "Storwize/SVC can not get the right host"