Fix Bug for #1573912 to change redis cluster creation under stack user. The bug is caused by creating redis cluster under root ,here change it under stack user.
Fix Bug for #1573912 to change redis cluster creation under stack user.
The bug is caused by creating redis cluster under root ,here change it
under stack user.

Change-Id: Icdac1efdfc2ca52b9b19318e33fddea01a2434cc
Closes-bug: #1573912

openstack/dragonflow,openstack/dragonflow,openstack/dragonflow