This commit adds the idempotent id decorator and the corresponding
tooling from the tempest repo
At the time of this migration the current head on each tempest file
is:
check_uuid.py: I1948c2d038d89af8dcfe69d01dcc49d024ae3210
test.py: Id2bcabb97c61f68dbcee5afbfaf9d27c8f52264c
test_decorators.py: I24f6e20cc8e310ba69fb23510795e235218abb2d
To get a complete history of the changes from tempest look up those
change ids from the tempest repo as a starting point.
Change-Id: Id0611ce8c1ccb319313959aa865dd91741295eb2