Remove hard-coded Python path in karma.conf.js

This patch removes hard-coded Python path in karma.conf.js
to fix the npm jobs because now these npm jobs run on
debian-bullseye and py38 are not available there.

It also update tox.ini for tox4 to fix the CI for the following:

- Drop "skipsdist = True".
  When skipsdist=True is specified, a target application is not
  installed into a tox env, but there seems no reason to do so.
  In various other OpenStack projects, a target applicatin needs
  to be installed into a tox vnev, for example, in docs and/or
  linter jobs and it causes failures with tox4. So dropping it
  would avoid potential future failures.
- Use comma to have multiple values in a single line for passenv
  variable in ``tox.ini`` file.
Change-Id: Ifc828c7142ca3c3f7105532b80fa5e0e91d80d69

Change-Id: I88f0be008537f34dd321f3afe8531ee0c237f681

karma.conf.js

@@ -21,7 +21,16 @@ var path = require('path');
 
 module.exports = function (config) {
   // This tox venv is setup in the post-install npm step
-  var toxPath = '.tox/py38/lib/python3.8/site-packages/';
+  var toxPath = path.resolve('./.tox/npm');
+  if (!toxPath) {
+      console.error('xStatic libraries not found, please run `tox -e npm`');
+      process.exit(1);
+    }
+    toxPath += '/lib/';
+    toxPath += fs.readdirSync(toxPath).find(function(directory) {
+      return directory.indexOf('python') === 0;
+    });
+    toxPath += '/site-packages/';
   var xstaticPath = toxPath + 'xstatic/pkg/';
 
   config.set({

tools/post_install.sh

@@ -10,4 +10,4 @@ then
 fi
 
 echo "Creating a tox env which will contain xStatic libraries, horizon, and openstack_dashboard"
-tox -epy38 --notest
+tox -enpm --notest

tox.ini

@@ -1,7 +1,6 @@
 [tox]
-envlist = py38,pep8
+envlist = py38, pep8, npm
 minversion = 2.0
-skipsdist = True
 ignore_basepython_conflict = True
 
 [testenv]
@@ -9,11 +8,12 @@ basepython = python3
 usedevelop = True
 setenv = VIRTUAL_ENV={envdir}
          DJANGO_SETTINGS_MODULE=muranodashboard.tests.settings
-passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
+passenv = http_proxy, HTTP_PROXY, https_proxy, HTTPS_PROXY, no_proxy, NO_PROXY
 deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
        http://tarballs.openstack.org/heat-dashboard/heat-dashboard-master.tar.gz
+allowlist_externals = {toxinidir}/manage.py
 commands =
   {toxinidir}/manage.py test muranodashboard --settings=muranodashboard.tests.settings