Fix swift auth problem
Fix swift auth problem

Current swift datasource driver doesn't provide auth options while
creating a swift client due to historical reason.

Change-Id: I1493143d558e1aef10feb504363d6efb758c16cf
Closes-Bug: #1499018

ramineni/my_congress,ramineni/my_congress,ramineni/my_congress,ramineni/my_congress,openstack/congress,openstack/congress