Fix indentation errors in drivers

Just some pylint fixes.

Change-Id: I1f851726a7c8285884121da097be574c447fa39c
Fix Huawei HVS driver AttributeError

This patch checks the iSCSI port info and raises an exception
if it can not get the port info from the configuration.

Closes-bug: #1237185
Change-Id: I341ccbe77abd25421e5ee0b2d07ace3759fbccef
Merge "Fix Huawei HVS driver AttributeError"
Merge "Fix indentation errors in drivers"