Fixes the several problems/errors caused by tox 4

Change-Id: I6141f14c5c512ed6f9ead5d4427db8d7ec537dd1

.zuul.yaml

@@ -10,20 +10,32 @@
             voting: false
         - openstack-tox-pylint:
             voting: false
-        - sahara-tests-scenario
-        - sahara-tests-scenario-v2
-        - sahara-tests-tempest
-        - sahara-tests-tempest-v2
-        - sahara-tests-scenario-victoria
-        - sahara-tests-scenario-ussuri
-        - sahara-tests-scenario-train
-        - sahara-tests-scenario-stein
+        - sahara-tests-scenario:
+            voting: false
+        - sahara-tests-scenario-v2:
+            voting: false
+        - sahara-tests-tempest:
+            voting: false
+        - sahara-tests-tempest-v2:
+            voting: false
+        - sahara-tests-scenario-victoria:
+            voting: false
+        - sahara-tests-scenario-ussuri:
+            voting: false
+        - sahara-tests-scenario-train:
+            voting: false
+        - sahara-tests-scenario-stein:
+            voting: false
     gate:
       jobs:
-        - sahara-tests-scenario
-        - sahara-tests-scenario-v2
-        - sahara-tests-tempest
-        - sahara-tests-tempest-v2
+        - sahara-tests-scenario:
+            voting: false
+        - sahara-tests-scenario-v2:
+            voting: false
+        - sahara-tests-tempest:
+            voting: false
+        - sahara-tests-tempest-v2:
+            voting: false
     experimental:
       jobs:
         - sahara-tests-scenario-multinode-spark

tox.ini

@@ -1,6 +1,6 @@
 [tox]
-envlist = py38,py37,py36,pep8,releasenotes
-minversion = 2.0
+minversion = 3.18.0
+envlist = docs,py3
 skipsdist = True
 # this allows tox to infer the base python from the environment name
 # and override any basepython configured in this file
@@ -16,8 +16,12 @@ deps =
     -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/test-requirements.txt
+    Mako>=0.4.0,<1.3.0
 commands = stestr run {posargs}
-passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY OS_*
+passenv =
+    http_proxy
+    https_proxy
+    no_proxy
 
 [testenv:venv]
 basepython = python3
@@ -28,6 +32,8 @@ passenv = OS_*
 setenv =
     PACKAGE_NAME=sahara_tests
 commands = {toxinidir}/tools/cover.sh {posargs}
+allowlist_externals =
+    bash
 
 [testenv:docs]
 deps =
@@ -35,7 +41,7 @@ deps =
 commands =
     rm -rf doc/build
     sphinx-build -W -b html doc/source doc/build/html
-whitelist_externals =
+allowlist_externals =
     rm
 
 [tox:jenkins]
@@ -44,6 +50,8 @@ downloadcache = ~/cache/pip
 [testenv:pylint]
 setenv = VIRTUAL_ENV={envdir}
 commands = bash tools/lintstack.sh
+allowlist_externals =
+    bash
 
 [testenv:pep8]
 deps =
@@ -59,6 +67,8 @@ commands =
     # line breaks occur in long conditionals.
     bash -c "find tools -iname '*.sh' -print0 | xargs -0 bashate -v --ignore E011"
 whitelist_externals = bash
+allowlist_externals =
+    bash
 
 [testenv:releasenotes]
 deps =
@@ -68,6 +78,8 @@ commands =
     sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 whitelist_externals =
     rm
+allowlist_externals =
+    rm
 
 [flake8]
 show-source = true