switch to using auth_url instead of auth_host et al

Also renames the badly named auth_uri to auth_url in neutron.conf

Closes-Bug: #1319280

Change-Id: Iae56fdf58841aa045e6038230cb19f254d05fbf4
Fix ovs_use_veth default in dhcp_agent.ini

The correct default for ovs_use_veth is False in IceHouse.
Fix the default and add a test case.

Change-Id: I156a61926987a10160835068fd84e8462ff58f7c
Closes-Bug: #1318790
Revert "switch to using auth_url instead of auth_host et al"

This reverts commit 6d252ac4841d66eb3ced83bdce09db0e16c7f9b2.

keystone_authtoken middleware has no config option for auth_url,
so the change breaks neutron-server from being able to contact the
correct keystone service (unless it runs on localhost,
which is what auth_host defaults to)

Related-Bug: #1319280
Change-Id: I41a2ecd0ada3ec59983fd408123b0f3570050bb1
Allow misc options for neutron.conf

Add support like alreayd exists for openrc, keystone and nova.conf.

Change-Id: I9efc9ebe4801d13f434a8d17057b9f49b072c527
Closes-Bug: #1321010
Add missing AMQP options to neutron.conf

Using the new attributes added in common, we can allow
deployers to optionally turn on durable queues, auto-delete
for queues, and enabled QPID federation support.

Bump common dependency version, since we need the attributes
introduced in 9.4

Depends on change I850c01a40aab02cf4531f7983543ef89e0e60446

Change-Id: I24c70dbcaedbe8db68286f6107ddce36da80d5d8