Allow server to start before drbdmanage commands run

DRBDmanage needs to wait until server is fully booted, before
running other commands.

Change-Id: I91a32b65aaf8c05d13058adcd862e662f1d32b47
Signed-off-by: Sam Leonard <sam@linbit.com>

devstack/lib/drbd_devstack

@@ -221,6 +221,7 @@ function configure_drbd_devstack {
     fi
 
     sudo drbdmanage shutdown --quiet
+    sudo drbdmanage wait-for-startup
     sudo drbdmanage debug 'set loglevel=debug'
     sudo drbdmanage nodes