CA-142451: Fail to report all LUNs advertised on targets sharing the sam...

...e IQN

If a multicontroller array advertises its targets using the same IQN
but different IPs and the LUNs in those targets are distinct,
we are able to show only LUNs coming from the first IP address.

This kind configuration could be the default for Netapp in the
future. We want to be able to support both this configuration
and the old one.

The fix reinstates a line that was removed in commit 391bdf055dff
in our old sm.hg repository.

Signed-off-by: Germano Percossi <germano.percossi@citrix.com>