[CVE-2015-5245] rgw: url encode exposed bucket

[CVE-2015-5245] rgw: url encode exposed bucket

This commit contains changes from:
	* http://tracker.ceph.com/issues/12537
	  rgw: url encode exposed bucket
	  Don't send the bucket name back without url encoding it.
	* http://tracker.ceph.com/issues/11860
	  rgw: Do not enclose the Bucket header in quotes
	  HTTP headers don't have to be enclosed when it's a string.

The aforementioned commits help to prevent CVE-2015-5245

Note: Changed test group for fuel-qa to work.

Closes-Bug: #1520185
Change-Id: I934309ecce99628b6d1309658ee3506cc4153d64