Fix deprecated zuul queue syntax and other gate issues

There are multiple issues with the gate. This patch combines the fixes
to unblock the gate.

1. Zuul deprecated (and removed) declaring shared queues at a pipeline
level [1]. This patch fixes the syntax to make the gate work again for
freezer.

2. Zuul CI jobs default nodeset is now Ubuntu 22.04 Jammy Jellyfish,
that does not provide anymore python2 binary, so python-dev needs to be
removed from bindep.txt

3. Latest tox does not allow to list the passed environment variables
in one line separated by space. One option is to list them in separate
lines. Also, external command allowing variable name changed.
basepython as python3 is also conflicts now and it is not necessary.
It looks like tox requires now to install now explicitly all the
requirements listed in requirements.txt.
tox.ini is updated accordingly to the above listed problems.

[1] https://lists.openstack.org/pipermail/openstack-discuss/2022-May/028603.html

Change-Id: I3c95bb48c7fdd0c752db121f1745f64a53b5a0e5

.zuul.yaml

@@ -1,4 +1,5 @@
 - project:
+    queue: freezer
     templates:
       - check-requirements
       - openstack-python3-zed-jobs
@@ -11,7 +12,6 @@
         - freezer-tempest-agent
         - freezer-tempest-scheduler
     gate:
-      queue: freezer
       jobs:
         - openstack-tox-pylint
         - freezer-tempest-agent

bindep.txt

@@ -4,7 +4,6 @@ libffi-devel [platform:rpm test]
 libssl-dev [platform:dpkg test]
 openssl-devel [platform:rpm test]
 # these are needed to compile Python dependencies from sources
-python-dev [platform:dpkg test]
 python3-all-dev [platform:dpkg !platform:ubuntu-precise test]
 python-devel [platform:rpm test]
 python3-devel [platform:rpm test]

tox.ini

@@ -3,10 +3,10 @@ envlist = py3,pep8,pylint,docs
 skipsdist = True
 
 [testenv]
-basepython = python3
 usedevelop = True
 deps =
     -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+    -r{toxinidir}/requirements.txt
     -r{toxinidir}/test-requirements.txt
 
 passenv =
@@ -20,7 +20,12 @@ passenv =
     FREEZER_TEST_OS_PASSWORD
     FREEZER_TEST_OS_AUTH_URL
     FREEZER_TEST_NO_LVM
-    http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
+    http_proxy
+    HTTP_PROXY
+    https_proxy
+    HTTPS_PROXY
+    no_proxy
+    NO_PROXY
 
 install_command = pip install {opts} {packages}
 setenv =
@@ -37,7 +42,7 @@ commands =
     rm -f .coverage
     rm -rf .testrepository
 
-whitelist_externals =
+allowlist_externals =
     find
     coverage
     rm
@@ -58,7 +63,7 @@ basepython = python3.8
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
-whitelist_externals = rm
+allowlist_externals = rm
 commands =
   rm -rf doc/build/
   sphinx-build --keep-going -b html doc/source doc/build/html
@@ -89,7 +94,7 @@ ignore-path = .venv,.git,.tox,.tmp,*freezer/locale*,*lib/python*,freezer.egg*,do
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
-whitelist_externals = rm
+allowlist_externals = rm
 commands =
   rm -rf releasenotes/build
-  sphinx-build -a -E -d releasenotes/build/doctrees --keep-going -b html releasenotes/source releasenotes/build/html
+  sphinx-build -a -E -d releasenotes/build/doctrees --keep-going -b html releasenotes/source releasenotes/build/html