tox: Minor tweaks

Set the 'PYTHONDONTWRITEBYTECODE' environment variable to avoid
generating '*.pyc' files, allowing us to remove explicit cleanup of
these from some tox environments.

Change-Id: I9b2cb923ec48f997a31d40325b6f0b2c025f8ee9
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

tox.ini

@@ -7,24 +7,21 @@ ignore_basepython_conflict = True
 [testenv]
 basepython = python3
 setenv =
-    PYTHON=coverage run --source barbican --parallel-mode
+  PYTHON=coverage run --source barbican --parallel-mode
+  PYTHONDONTWRITEBYTECODE=1
 usedevelop = True
 deps =
   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/test-requirements.txt
-
 commands =
-    oslo-config-generator --config-file etc/oslo-config-generator/barbican.conf --output-file etc/barbican/barbican.conf
-    /usr/bin/find . -type f -name "*.py[c|o]" -delete
-    rm -f .testrepository/times.dbm
-    coverage erase
-    stestr run {posargs}
-    coverage combine
-    coverage html -d cover
-    coverage xml -o cover/coverage.xml
-    coverage report -m
-allowlist_externals = rm
+  oslo-config-generator --config-file etc/oslo-config-generator/barbican.conf --output-file etc/barbican/barbican.conf
+  coverage erase
+  stestr run {posargs}
+  coverage combine
+  coverage html -d cover
+  coverage xml -o cover/coverage.xml
+  coverage report -m
 
 [testenv:cover]
 deps =
@@ -40,6 +37,8 @@ commands =
 
 [testenv:releasenotes]
 deps = {[testenv:docs]deps}
+allowlist_externals =
+  rm
 commands =
   rm -rf releasenotes/build
   sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
@@ -80,9 +79,10 @@ deps =
   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
 commands=
-    rm -rf doc/build doc/build/doctrees
-    sphinx-build -W -b html doc/source doc/build/html
-allowlist_externals = rm
+  rm -rf doc/build doc/build/doctrees
+  sphinx-build -W -b html doc/source doc/build/html
+allowlist_externals =
+  rm
 
 [testenv:pdf-docs]
 deps = {[testenv:docs]deps}
@@ -99,15 +99,18 @@ deps = {[testenv:docs]deps}
 commands =
   rm -rf api-guide/build
   sphinx-build -W -b html -d api-guide/build/doctrees api-guide/source api-guide/build/html
+allowlist_externals =
+  rm
 
 [testenv:all-docs]
 description = Build all documentation
 deps = {[testenv:docs]deps}
 commands=
-    {[testenv:docs]commands}
-    {[testenv:api-guide]commands}
-    {[testenv:releasenotes]commands}
-allowlist_externals = rm
+  {[testenv:docs]commands}
+  {[testenv:api-guide]commands}
+  {[testenv:releasenotes]commands}
+allowlist_externals =
+  rm
 
 [testenv:functional]
 # This tox env is purely to make local test development easier