This commit bakes several cleanups into one patch. First it clearly
separates devstack and tempest specs by creating a separate tempest
subdir for specs. The next step is moving all implemented specs/bps
into the implemented dir to indicate this. The last is deleting specs
which were outdated and never implemented.
Change-Id: I86331ac279b6a9cdb94ed4c43e5b0c41697e6a7d
c5b1920556