Fix tox-checkbuild CI job

[Changes in zuul configurations]
- playbooks/checkbuild/pre.yaml calls ensure-nodejs role, but the default
  nodejs version defined in ensure-nodejs role is still 6. nodejs6 repo
  is no longer available. This is the cause of the job failure.
  Let's specify nodejs_version used in horizon by default.
- Ensure to install tox globally in the system.
  tox -e checkbuild calls "tox" as the test commands,
  so it needs to be installed globally.
- Specify "python_version" so that zuul ensures to install a required
  version of python interpreter.

[Changes in cookiecutter template]
- hacking version in test-requirements.txt was too old.
  It is updated to use more recent version which horizon uses.
- Update python version to 3.9 in tox.ini.
- Install horizon and its dependencies separately.
  The constraints file contains horizon, so installing horizon along with
  the constraints file results in a version conflict error.

Change-Id: If4bae3fde1f29eeb1d4d43942acc21ff2ef19482

.zuul.yaml

@@ -5,6 +5,12 @@
     post-run: playbooks/checkbuild/post.yaml
     vars:
       tox_envlist: checkbuild
+      ensure_global_symlinks: true
+      # node_version should match the default nodejs version
+      # used in horizon nodejs jobs.
+      node_version: 14
+      # It should match the python version in tox.ini in the template
+      python_version: 3.9
 - project:
     check:
       jobs:

tox.ini

@@ -26,7 +26,7 @@ commands =
   cookiecutter --no-input --output-dir {envdir} {toxinidir}
   # To pass {postargs} for running `tox -edocs` in generated plugin,
   # run `tox -- -edocs` in ui-cookiecutter.
-  tox --workdir {envdir}/cafe-ui/.tox -c {envdir}/cafe-ui/tox.ini {posargs}
+  tox -vv --workdir {envdir}/cafe-ui/.tox -c {envdir}/cafe-ui/tox.ini {posargs}
 whitelist_externals =
   git
   rm

{{cookiecutter.repo_name}}/package.json

@@ -26,7 +26,7 @@
   },
   "dependencies": {},
   "scripts": {
-    "postinstall": "if [ ! -d .tox ] || [ ! -d .tox/karma ]; then tox -ekarma --notest; python3 -m pip install -U -t ./.tox/karma/lib/`python3 -V|tr -d ' '|tr 'P' 'p'|cut -c -9`/site-packages/ -chttps://releases.openstack.org/constraints/upper/master ../horizon; fi",
+    "postinstall": "if [ ! -d .tox ] || [ ! -d .tox/karma ]; then tox -ekarma --notest; .tox/karma/bin/pip install -chttps://releases.openstack.org/constraints/upper/master -r../horizon/requirements.txt -r../horizon/test-requirements.txt; .tox/karma/bin/pip install ../horizon; fi",
     "lint": "eslint --no-color {{ cookiecutter.module_name }}/static",
     "lintq": "eslint --quiet {{ cookiecutter.module_name }}/static",
     "test": "karma start {{ cookiecutter.module_name }}/karma.conf.js --single-run"

{{cookiecutter.repo_name}}/test-requirements.txt

@@ -7,7 +7,7 @@
 # be installed in a specific order.
 #
 # Hacking should appear first in case something else depends on pep8
-hacking>=1.1.0,<1.2.0 # Apache-2.0
+hacking>=3.0.1,<3.1.0 # Apache-2.0
 
 coverage!=4.4,>=4.0 # Apache-2.0
 mock>=2.0.0 # BSD

{{cookiecutter.repo_name}}/tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = pep8,py36-local,py3-dj20-local,eslint,karma-local,docs-local,releasenotes
+envlist = pep8,py39-local,py3-dj32-local,eslint,karma-local,docs-local,releasenotes
 minversion = 2.3.2
 skipsdist = True
 
@@ -45,23 +45,23 @@ commands =
   coverage xml --omit '.tox/cover/*' -o 'cover/coverage.xml'
   coverage html --omit '.tox/cover/*' -d 'cover/htmlcov'
 
-[testenv:py36-local]
-basepython = python3.6
+[testenv:py39-local]
+basepython = python3.9
 commands =
   {[testenv:hz-local]commands}
   {[testenv]commands}
 
-[testenv:py3-dj22]
+[testenv:py3-dj32]
 basepython = python3
 commands =
-  pip install django>=2.2,<3
+  pip install django>=3.2,<3.3
   {[testenv]commands}
 
-[testenv:py3-dj22-local]
+[testenv:py3-dj32-local]
 basepython = python3
 commands =
   {[testenv:hz-local]commands}
-  pip install django>=2.2,<3
+  pip install django>=3.2,<3.3
   {[testenv]commands}
 
 [testenv:eslint]