Pass configured auth strategy to neutronclient

When the token is invalid Nova emits a log trace about an
unknown auth strategy (caused by neutron client). This is a
red herring and is only masking the fact that the token was
unable to be validated in the first place.

Partial-bug: 1297309

Change-Id: Ia3801f80c7ca18674fcf46b5270aa04f6c8c9331
Remove nova-clear-rabbit-queues

It was already non-functional since
https://review.openstack.org/#/c/40355/

Change-Id: I56b19a49c123b73b6b3a5c4fc5f29864c6fd3b98
Closes-Bug: #1307460
Deprecate aggregate_host_* operations in conductor

This marks aggregate_host_add() and aggregate_host_delete() as
deprecated in conductor.

Related to blueprint compute-manager-objects-juno

Change-Id: Icb84a730c737160ba194586a523f18c4dcf1c96d
Deprecate network_migrate_instance_* from conductor

This deprecates network_migrate_instance_start() and
network_migrate_instance_finish() from conductor, which are no
longer used.

Related to blueprint compute-manager-objects-juno

Change-Id: I01d7d502e8e8016cef3006ceddbcb31bccc4baf8
Merge "Remove nova-clear-rabbit-queues"
Merge "Pass configured auth strategy to neutronclient"
Merge "Deprecate aggregate_host_* operations in conductor"
Merge "Deprecate network_migrate_instance_* from conductor"