Sync excutils from oslo

[Oleg Bondarev]

In order to fix undesired error logs in Neutron (bug 1288188) fixed save_and_reraise_exception() should be synced from oslo.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/81480

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/81480
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=98fc828801f370c0561f22d97ffdd1055d4e0663
Submitter: Jenkins
Branch: master

commit 98fc828801f370c0561f22d97ffdd1055d4e0663
Author: Oleg Bondarev <email address hidden>
Date: Wed Mar 19 12:32:47 2014 +0400

    Sync excutils from oslo

    In order to fix undesired error logs in Neutron (bug 1288188)
    fixed save_and_reraise_exception() should be synced from oslo.
    Oslo commit: 33a2cee6a690ecfdb2cecfe8f01b0b1dacb5bd17

    Also sync gettextutils module as excutils depends on it
    Latest commit in oslo: fd33d1eaa039913d8c82b94c511a3eab0c3d5789

    Closes-Bug: #1294537
    Related-Bug: #1288188
    Change-Id: I62ab3e4e22aa000f3a8d1be26ef9e1cfb1714959