excutils.save_and_reraise_exception should be used when reraising an exception

[Akihiro Motoki]

excutils.save_and_reraise_exception should be used when reraising an exception, as described in openstack.common.excutils.

I don't see any issues due to this but it is better to be fixed.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/73293

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/73294

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/73295

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/73293
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=b3ec1cd6578a19413893a6b2ef276532c44c2a4f
Submitter: Jenkins
Branch: master

commit b3ec1cd6578a19413893a6b2ef276532c44c2a4f
Author: Akihiro Motoki <email address hidden>
Date: Wed Feb 12 23:18:36 2014 +0900

    Use save_and_reraise_exception when reraise exception

    This commit fixes neutron core and common codes.

    Partial-Bug: #1279813
    Change-Id: Id109924c7ff9b4f0d74c23665016a54bfd7dff77

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/73295
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=6b13ee0c3b446b7fc4f440dd58c9226bf4abfdf8
Submitter: Jenkins
Branch: master

commit 6b13ee0c3b446b7fc4f440dd58c9226bf4abfdf8
Author: Akihiro Motoki <email address hidden>
Date: Thu Feb 13 02:51:45 2014 +0900

    Avoid using "raise" to reraise with modified exception

    The code changes the exception and reraises it.
    This commit changes the code to use the same way as
    excutils.save_and_reraise_exception does to ensure
    the exception context.

    This is the last patch of reraise clean up series.

    Closes-Bug: #1279813
    Change-Id: I8787dcbdc8321f75964de26e97cae395707aafc2

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/73294
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=3c0025abf4581dc3561637e802de7bba1434d2b3
Submitter: Jenkins
Branch: master

commit 3c0025abf4581dc3561637e802de7bba1434d2b3
Author: Akihiro Motoki <email address hidden>
Date: Wed Feb 12 23:25:14 2014 +0900

    Use save_and_reraise_exception when reraise exception

    This fixes reraise in pluign codes.

    Closes-Bug: #1279813
    Change-Id: Iee174d94c0ce69eb01eb86eea1a903eceb7569d5