If the standby is down, and the synchronous_standby_names is *, the cluster will not start

Co-authored-by: NNing Yu <nyu@pivotal.io>

gpMgmt/bin/gpinitstandby

@@ -277,6 +277,20 @@ def delete_standby(options):
     # Disable Ctrl-C
     signal.signal(signal.SIGINT,signal.SIG_IGN)
     
+    # If the standby is down, and the synchronous_standby_names is *, the cluster will not start
+    # set synchronous_standby_names to ''
+    cmd = gp.GpAddConfigScript('master',
+                               array.master.datadir,
+                               'synchronous_standby_names',
+                               value="''",
+                               removeonly=False,
+                               ctxt=gp.REMOTE,
+                               remoteHost=array.master.hostname,
+                               autoconf=True)
+    cmd.run(validateAfter=True)
+    # make it effective
+    pg.ReloadDbConf.local('pg_ctl reload', array.master)
+
     try:
         remove_standby_from_catalog(options, array)
     except Exception, ex: