geo-rep / glusterd: do non-blocking connect to checkpoint service

glusterd should not hang if gsyncd ends up in some weird state

Change-Id: Ic141daa0cd05d515848c8b6c25702418e15b7599
BUG: 826512
Signed-off-by: Csaba Henk <csaba@redhat.com>
Reviewed-on: http://review.gluster.org/3919
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>