[RM-36583] align with create by using short hostname

If using fully qualified domain name to check monitor
status after "mon add", it will hit the error that can't
find the node file under /var/run/ceph/ which result
in aboring add monitor

Signed-off-by: Changcheng Liu <changcheng.liu@intel.com>

ceph_deploy/mon.py

@@ -193,6 +193,7 @@ def mon_add(args):
     )
 
     mon_section = 'mon.%s' % mon_host
+    (name, host) = next(mon_hosts(args.mon))
     cfg_mon_addr = cfg.safe_get(mon_section, 'mon addr')
 
     if args.address:
@@ -223,8 +224,8 @@ def mon_add(args):
 
         # tell me the status of the deployed mon
         time.sleep(2)  # give some room to start
-        catch_mon_errors(distro.conn, rlogger, mon_host, cfg, args)
-        mon_status(distro.conn, rlogger, mon_host, args)
+        mon_status(distro.conn, rlogger, name, args)
+        catch_mon_errors(distro.conn, rlogger, name, cfg, args)
         distro.conn.exit()
 
     except RuntimeError as e: