Merge "Do not generate bytecode in tests"

tox.ini

@@ -4,7 +4,8 @@ minversion = 4.28.0
 skipsdist = True
 
 [testenv]
-allowlist_externals = bash
+setenv =
+  PYTHONDONTWRITEBYTECODE=1
 constraints =
   {env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
 deps =
@@ -37,12 +38,11 @@ builtins = _
 exclude=.venv,.git,.tox,*lib/python*,private,.eggs
 
 [testenv:cover]
-allowlist_externals = find
 setenv =
+  {[testenv]setenv}
   PYTHON=coverage run --source . --parallel-mode
 commands =
   coverage erase
-  find . -type f -name "*.pyc" -delete
   stestr run {posargs}
   coverage combine
   coverage html -d cover