Updated openstack/openstack
Project: openstack/tempest  29ed79aaff516ffaf450605a1c8a2b138b9680cc
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Add design principles to docs

One of the things we should make clear is what Tempest is, and what
it isn't at any point in time. This should be up front and center
in our README

Change-Id: I3b92c8afe7031630f97a4fb060bf7b555f1bb1c2