Don't declare success early

Here we're very far from entering the main loop, even farther from
sending the READY notification to systemd.  This sounded awkward:

systemd[1]: Starting Corosync Cluster Engine...
corosync[827]:   [MAIN  ] Corosync Cluster Engine ('2.99.5'):
  started and ready to provide service.
corosync[827]:   [MAIN  ] Corosync built-in features: dbus monitoring
  watchdog augeas systemd xmlconf snmp pie relro bindnow
corosync[827]:   [MAIN  ] parse error in config: No interfaces defined
corosync[827]:   [MAIN  ] Corosync Cluster Engine exiting with status 8
  at main.c:1378.
systemd[1]: corosync.service: Main process exited, code=exited,
  status=8/n/a
systemd[1]: corosync.service: Failed with result 'exit-code'.
systemd[1]: Failed to start Corosync Cluster Engine.

Signed-off-by: Ferenc Wágner <wferi@debian.org>
Reviewed-by: Jan Friesse <jfriesse@redhat.com>
Reviewed-by: Christine Caulfield <ccaulfie@redhat.com>

exec/main.c

@@ -1318,7 +1318,7 @@ int main (int argc, char **argv, char **envp)
 	}
 
 	if (!testonly) {
-		log_printf (LOGSYS_LEVEL_NOTICE, "Corosync Cluster Engine ('%s'): started and ready to provide service.", VERSION);
+		log_printf (LOGSYS_LEVEL_NOTICE, "Corosync Cluster Engine %s starting up", VERSION);
 		log_printf (LOGSYS_LEVEL_INFO, "Corosync built-in features:" PACKAGE_FEATURES "");
 	}