We want this module for use elsewhere. This has a natural home in the
neutron.api module so move it there. This is similar to what has
previously been done for nova [1].
Tests for the module are also moved and other tests slightly decoupled.
[1] https://review.opendev.org/c/openstack/nova/+/902686
Change-Id: I835e7ad95b6d7d83d06f4303b476519c16b9a2c8
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
34fafa2d8c