NSX: l2 gw extension unnecessarily extends fault map

[Salvatore Orlando]

Almost all the exceptions added to the fault map in [1] are already extending a mapped extension.

Extending the fault map could then be avoided.

[1] https://github.com/openstack/neutron/blob/master/neutron/plugins/vmware/dbexts/networkgw_db.py#L89

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/93565

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/93565
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=9a7f7cf7d344db2fe0b73ea5de0b6992c52b46a4
Submitter: Jenkins
Branch: master

commit 9a7f7cf7d344db2fe0b73ea5de0b6992c52b46a4
Author: Salvatore Orlando <email address hidden>
Date: Wed May 14 07:23:55 2014 -0700

    NSX: Do not extend fault map for network gateway ext

    Most of the exceptions defined for this extension already extend
    an exception-mapped class. This patch ensures this is true for
    every exception and then removes the fault map extension code.

    Change-Id: Ifdd9b6d3892cff2d076bdab3a2a1252923e3f85d
    Closes-Bug: 1319423