Rebase swiftkerbauth imported code with upstream

Few changes have been merged to upstream swiftkerbauth repo.
This commit brings it down to gluster-swift repo.
Bringing below changes to gluster-swift repo in one go.

http://review.gluster.org/#/c/6296/
http://review.gluster.org/#/c/6370/
http://review.gluster.org/#/c/6595/
http://review.gluster.org/#/c/6713/
http://review.gluster.org/#/c/6732/

Change-Id: I10dc12d75ec63fca313339fbc71e4f18071af552
Signed-off-by: Chetan Risbud <crisbud@redhat.com>
Reviewed-on: http://review.gluster.org/6764
Reviewed-by: Prashanth Pai <ppai@redhat.com>
Fixes some TCs that assert for response code 403

For some scenarios although the expected response as per the
REST spec is 403, but due to technical limitation/performance
improvements it is decided to go with 401.EX:An admin/regular
user tries to add a reseller admin user.

Change-Id: Ibc280a0be6e5cb81d4d2c46d9a758915ff60ae8f
Reviewed-on: http://review.gluster.org/6833
Reviewed-by: Prashanth Pai <ppai@redhat.com>
Reviewed-by: Chetan Risbud <crisbud@redhat.com>
Tested-by: Chetan Risbud <crisbud@redhat.com>
adding error handling to gswauth-cleanup-tokens tool

added input validation for a couple of options and
error handling in case a non-existing account name
is provided

Change-Id: I6d703d584552fc7b7574f34e79ed25a2982b6d5e
Signed-off-by: Thiago da Silva <thiago@redhat.com>
Reviewed-on: http://review.gluster.org/6767
Reviewed-by: Prashanth Pai <ppai@redhat.com>
Tested-by: Prashanth Pai <ppai@redhat.com>
Reviewed-by: pushpesh sharma <psharma@redhat.com>
Tested-by: pushpesh sharma <psharma@redhat.com>
Reviewed-by: Chetan Risbud <crisbud@redhat.com>
Attempt to fix failing testMetadataOnPost functional test

On Jenkins, functional tests occasionally fail in testMetadataOnPost test case
with ResponseNotReady exception. This is an attempt to fix that as I'm
guessing that the following could be the reason.

It is advised to read the whole response body before sending a new request:
http://docs.python.org/2/library/httplib.html#httplib.HTTPConnection.getresponse
http://hg.python.org/cpython/file/2.7/Lib/httplib.py#l1033

Change-Id: I2ee880fd15af8766dcbd12f84ef561a67acdcdce
Signed-off-by: Prashanth Pai <ppai@redhat.com>
Reviewed-on: http://review.gluster.org/6945
Reviewed-by: Chetan Risbud <crisbud@redhat.com>
Tested-by: Chetan Risbud <crisbud@redhat.com>
Revert "Attempt to fix failing testMetadataOnPost functional test"

This reverts commit ad6fb3558019e0f65de0b36c2c2f78d94925838c

Change-Id: I0e04c923880b3b987bedb04fdb10d3f9813bb884
Reviewed-on: http://review.gluster.org/6952
Reviewed-by: Chetan Risbud <crisbud@redhat.com>
Tested-by: Chetan Risbud <crisbud@redhat.com>
simplifying instructions in auth guide

Attempted to simplify the instructions around authenticating with
swift client.

Provided users a basic and more advanced method of authenticating.
The previous version only listed the advanced method, which is still
necessary because it instructs reseller admins on how to access
other accounts

Bug: https://bugs.launchpad.net/gluster-swift/+bug/1267445

Change-Id: I99cae591627616206fb5277af4b636b8dd2ca3cd
Signed-off-by: Thiago da Silva <thiago@redhat.com>
Reviewed-on: http://review.gluster.org/6863
Reviewed-by: pushpesh sharma <psharma@redhat.com>
Reviewed-by: Prashanth Pai <ppai@redhat.com>
Reviewed-by: Chetan Risbud <crisbud@redhat.com>
Tested-by: Chetan Risbud <crisbud@redhat.com>