IOA for FCoE Connectivity

All the VLANs were removed before adding the new VLANs. This was leading to traffic disruption during the session retry.
Update is added to find the VLANs that needs to be added or removed.
VLAN creation failed in case the interface was in auto-vlan mode
Additional check for null vlans
Merge pull request #17 from sushilrai/uplink_config

IOA for FCoE Connectivity