vm: state change missing return value

Return arguments where ignored in schema for pause and resume verbs.
We had to update command_info with following verbs to returned
'vmList' dictionary required by the engine.


Change-Id: If0737403dcfa0ccd0a3c2813b215b4d5fa958eca
Signed-off-by: pkliczewski <piotr.kliczewski@gmail.com>
Bug-Url: https://bugzilla.redhat.com/1163089
Reviewed-on: http://gerrit.ovirt.org/35105
Reviewed-by: Francesco Romani <fromani@redhat.com>
Tested-by: Francesco Romani <fromani@redhat.com>
Reviewed-by: Omer Frenkel <ofrenkel@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>