Added test for re-selecting machine when updated
Added test for re-selecting machine when updated

jrwren/juju-gui,bac/juju-gui,bac/juju-gui,mitechie/juju-gui,mitechie/juju-gui,mitechie/juju-gui,jrwren/juju-gui,bac/juju-gui,jrwren/juju-gui,mitechie/juju-gui,bac/juju-gui,jrwren/juju-gui