remove redis db when  reinstall compass
remove redis db when  reinstall compass

Change-Id: I889ec091c78a7e1781328cefff80f7b038a741aa

baigk/compass-core,stackforge/compass-core,stackforge/compass-core,baigk/compass-core,openstack/compass-core,openstack/compass-core,stackforge/compass-core,stackforge/compass-core,openstack/compass-core,baigk/compass-core,openstack/compass-core