Merge "Delete *.pyc files before running tox tests"

tox.ini

@@ -20,9 +20,13 @@ deps = -r{toxinidir}/test-requirements.txt
 # to ncpu, to specify something else use
 # the concurrency=<n> option.
 # call ie: 'tox -epy27 -- --concurrency=4'
-commands = ostestr {posargs}
+commands =
+  find . -type f -name "*.pyc" -delete
+  ostestr {posargs}
 
-whitelist_externals = bash
+whitelist_externals =
+  bash
+  find
 passenv = *_proxy *_PROXY
 
 [testenv:api-ref]