Updated openstack/openstack
Project: openstack/neutron  a8c3c0c1ab4cfd9c4f2316f4da3de0b21a770326
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Fix error while creating l2 gateway services in nvp

Ensure that Conflict errors are not masked; also ensure
that coding errors do not mask NVP API errors.

Fixes bug #1244259

Change-Id: I27586d72af89fd39f6443dbab33f0e4e762b0c99