CLOUDSTACK-747: Internal LB detailView - Assigned VMs tab - Assign VMs action - fix a bug that select VM view failed to show VMs.
CLOUDSTACK-747: Internal LB detailView - Assigned VMs tab - add source port, instance port to listView.
CLOUDSTACK-2880: UI - zone detail - add VMware DC action - replace URL field with vcenter field and make vcenter required.