vr: restart conntrackd instead of '/usr/sbin/conntrackd -d' (#5275)

* vr: restart conntrackd instead of '/usr/sbin/conntrackd -d'

* vr: remove unused cmd

* Revert "vr: remove unused cmd"

This reverts commit b97cf469952fe0706d91af411eaffa62a06761a6.

* vr: remove unused cmd

Author: weizhouapache

systemvm/debian/opt/cloud/bin/cs/CsRedundant.py

@@ -279,8 +279,7 @@ def set_backup(self):
             CsHelper.execute(cmd2)
             dev = interface.get_device()
 
-        cmd = "%s -C %s" % (self.CONNTRACKD_BIN, self.CONNTRACKD_CONF)
-        CsHelper.execute("%s -d" % cmd)
+        CsHelper.service("conntrackd", "restart")
         CsHelper.service("ipsec", "stop")
         CsHelper.service("xl2tpd", "stop")