janonymous be54d0c928 clear pycache and remove all pyc/pyo before starting unit test
Delete python bytecode before every test run.
Because python creates pyc files during tox runs, certain
changes in the tree, like deletes of files, or switching
branches, can create spurious errors.

Closes-Bug: #1368661
Change-Id: Iedcb400fa3b0417f5bb8e943b17758fcfb4070c6
2016-03-04 17:32:12 +00:00
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