tox: Trivial cleanups

Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
Change-Id: I6a78a626916796b7c385a89d2139b621140d6c0c

tox.ini

@@ -5,13 +5,12 @@ ignore_basepython_conflict = true
 
 [testenv]
 basepython = python3
-install_command = pip install {opts} {packages}
-whitelist_externals = find
-                      rm
 deps =
-       -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
-       -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
+    -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+    -r{toxinidir}/requirements.txt
+    -r{toxinidir}/test-requirements.txt
+setenv =
+    PYTHONDONTWRITEBYTECODE=1
 commands =
     stestr run --slowest {posargs}
 
@@ -36,8 +35,10 @@ commands =
     coverage report
 
 [testenv:docs]
-whitelist_externals = rm
-deps = -r{toxinidir}/doc/requirements.txt
+whitelist_externals =
+    rm
+deps =
+    -r{toxinidir}/doc/requirements.txt
 commands =
     rm -rf doc/build
     sphinx-build -E -W --keep-going -b html doc/source doc/build/html
@@ -49,12 +50,12 @@ commands = oslo_debug_helper {posargs}
 # E123, E125 skipped as they are invalid PEP-8.
 show-source = True
 ignore = E123,E125,E731,W504
-exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build
+exclude = .venv,.git,.tox,dist,doc,*lib/python*,*egg,build
 
 [testenv:releasenotes]
-whitelist_externals = rm
+whitelist_externals =
+    rm
 deps = {[testenv:docs]deps}
 commands =
-  rm -rf releasenotes/build
-  sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
-
+    rm -rf releasenotes/build
+    sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html