webadmin: UI-Plugins - VM IP address mapping

Add mapping to VM IP address,

EntityObject:
Map 'getVmIp' to 'ipaddress' property (IP Address column).

Change-Id: I24b1208031d454d1774a43ddb0cccd7a85f23d2e
Signed-off-by: Daniel Erez <derez@redhat.com>