restapi : missing sync option for action vm import in RSDL(#949881)

No sync option in cli for action vm import.

Change-Id: I84799bf942dd87956cb2f42c5b57201687d32fda
Bug-Url: https://bugzilla.redhat.com/949881
Signed-off-by: Ravi Nori <rnori@redhat.com>