Updated openstack/openstack
Project: openstack/nova  aa1e956b008c4f8ba7d0647232ddaa3d2e1e3ee1
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Group kvm image_meta tests for get_disk_bus

Refactoring test_get_disk_bus to eliminate duplicate code by
adding a loop to the image_meta tests.

Change-Id: Id8f342a0739db01635c2ca925788d7a258f8a478