Use textwrap instead of home made implementation

[Cedric Brandily]

Currently python-keystoneclient uses a homemade implementation in token_to_cms to wrap token to 64 characters per line. We should use python standard lib implementation (textwrap) instead

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/139032
Committed: https://git.openstack.org/cgit/openstack/python-keystoneclient/commit/?id=4350c176048b8d159d08b82b915e9544ac9dee6f
Submitter: Jenkins
Branch: master

commit 4350c176048b8d159d08b82b915e9544ac9dee6f
Author: Cedric Brandily <email address hidden>
Date: Thu Dec 4 13:06:08 2014 +0100

    Use textwrap instead of home made implementation

    This change replaces a home made text wrapper by textwrap module. It is
    a non-functional change which is covered by existing tests.

    Closes-Bug: #1404402
    Change-Id: I5cc4da61205f64b478366c29e6d7ff9929ad4d16

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/252355

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/252355
Committed: https://git.openstack.org/cgit/openstack/python-keystoneclient/commit/?id=fde0bf77d6a89ee84e62461bc0d4c2cdfd809c48
Submitter: Jenkins
Branch: master

commit fde0bf77d6a89ee84e62461bc0d4c2cdfd809c48
Author: Bernhard M. Wiedemann <email address hidden>
Date: Wed Dec 2 12:47:33 2015 +0100

    Replace textwrap with fast standard code

    This improves on commit 4350c176048b8d159d08b82b915e9544ac9dee6f

    We found a major performance regression in keystoneclient
    when using PKI tokens, related to http://bugs.python.org/issue25870

    It can be tested with
    time python -c "import textwrap; textwrap.wrap('x'*9000, 64)"

    which has a complexity of O(n*n)
    because it uses certain regexps in python versions before 3.5.

    Closes-Bug: #1526686
    Related-Bug: #1404402

    Change-Id: Ibc81907c4d9db2c09fff41ccf21345fbdb19202d