rgmanager: Fix return code when relocation fails and svc is running on original node
    
    Return RG_ERELO (Relocation failure; service running on original node) when
    relocation failed and the service was restarted successfully on the original
    node.
    
    This is the behavior that's currently in the STABLE32 and RHEL6 branches.
    
    Acked-by: Lon Hohberger <lhh@redhat.com>
    Signed-off-by: Ryan McCabe <rmccabe@redhat.com>