Updated openstack/openstack
Project: openstack/tempest  66d6e4401b87571549ac1506c7b607dcb9a43bc3
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Add unit tests for NegativeRestClient class

This commit adds unit tests for NegativeRestClient.

Partially implements bp unit-tests

Change-Id: I47db1b23b85b7636516292d4a6b78fba0afcfe99