Add two tests for resize action in ServerActionsControllerTest.

Add test_resize_not_found for NotFound;
and test_resize_with_too_many_instances for TooManyInstances.

Fix bug #1089417

Change-Id: I18dda1129e1bb3d411bb8a5dab9474d67fcb18fd
Added sample tests to QuotaClasses API.

Partially implements blueprint nova-api-samples
Fixes bug 1070171

Change-Id: I504a9120a0980a727bda21ca2ac76a5d06477e66
Sync rpc and notifier from oslo-incubator.

This patch syncs the latest changes to rpc and notifier from
oslo-incubator.  The most significant changes are for adding support for
a message envelope for all messages, including notifications, sent via
rpc.

Related oslo-incubator reviews:

    https://review.openstack.org/#/c/17554/
    https://review.openstack.org/#/c/18057/

Note that a new notifier module was added: rpc_notifier2, which when
used, sends notifications out with a message envelope.

DocImpact.

Implements bp version-rpc-messages.

Change-Id: I495c224d0c502086ce3db6c078d48829b8d913a6
Merge "Added sample tests to QuotaClasses API."
Merge "Sync rpc and notifier from oslo-incubator."
Merge "Add two tests for resize action in ServerActionsControllerTest."