gswauth: Fix 403 being returned instead of 401

- 401(Unauthorized) is to be returned when user credentials are
  wrong where as 403(Forbidden) is to be returned when user
  credentials are correct but the user doesn't have the priveleges
  to carry out the operation.

- Also error messages displayed when using swauth-* command line
  utilities have been updated.

Change-Id: I485786896ad14d3263f4325d1857cacc93adab96
Signed-off-by: Prashanth Pai <ppai@redhat.com>
Reviewed-on: http://review.gluster.org/6336
Reviewed-by: Luis Pabon <lpabon@redhat.com>
Tested-by: Luis Pabon <lpabon@redhat.com>
Functional TCs for Multi-Protocol Access

1.testObjectsFromMountPoint verifies the directory
structure from mount point that is created by REST
This test uses os,re and other python modules.
It assumes the root directory is /mnt/gluster-object

2.testObjectContentFromMountPoint check md5 sum computed
from mount point is same as etag.

Change-Id: I676218c9b828022f599f4dea7ad0284777fc0506
Signed-off-by: Pushpesh Sharma <psharma@redhat.com>
Reviewed-on: http://review.gluster.org/6208
Reviewed-by: Luis Pabon <lpabon@redhat.com>
Tested-by: Luis Pabon <lpabon@redhat.com>
Reviewed-on: http://review.gluster.org/6443
Return BadRequest on X-Delete-At/After headers

Gluster-swift does not support X-Delete-After or X-Delete-At
headers.  The code needs to inform the caller with a 400-BadRequest
if they use these headers.

Change-Id: Ic9d3a1646c0d26bb0204245efce4501f7479fee6
Signed-off-by: Luis Pabon <lpabon@redhat.com>
Reviewed-on: http://review.gluster.org/6364
Reviewed-by: Chetan Risbud <crisbud@redhat.com>
Reviewed-on: http://review.gluster.org/6444