Updated openstack/openstack
Project: openstack/nova  e3dee3b05fec6aba05c95700abe6e8c4ea1c8a1a
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Rewrite InstanceAction object test cases using mock

This change rewrites the InstanceAction object test cases as a
groundwork for other InstanceAction changes to come.

This is a part of: blueprint make-instance-action-use-objects

Change-Id: I73eafa778bc0b558fe3c3497ec6892f52e8088db