restapi : action command async and grace_period-expiry missing in auto-completion

action <type> <id> <action> command accepts async and
grace_period-expiry parameters but they are missing in
auto-completion

Change-Id: I49db8d3cd89b0ab498422bbce7ba43a1834c3c43
Bug-Url: https://bugzilla.redhat.com/1047654
Signed-off-by: Ravi Nori <rnori@redhat.com>