Fixed the issue(bug id 1356359), when we select the floating IP in the dropdown in interface details page no stats are displaying
RootCause:Because floating ip stats object is moved to  new VirtualMachineStats object in instance UVE
Fix:Pointed to correct object path in the instance UVE response

Change-Id: Ic527852a1269ac4e4d2ac9f1f1f93b1e101dc8cb