tox: drop test-requirements.txt

We have several tox environments that don't really share the same
dependencies.  Currently we put everything into test-requirements.txt,
meaning the linter environment gets testinfra and testinfra
environment gets things like ansible-lint it's not using.

Apart from being a bit faster not installing things, this is helpful
for restoring the ansible -devel test.  In that case, we have ansible
as a project dependency; when installing from git, ansible now
installs itself as "ansible-base" ("ansible" is the released pypi
package that incorporates collections).  So if we install ansible-lint
in the testinfra environment, this pulls in ansible ... and then it
breaks when tox wants to install our Zuul clone of upstream ansible
(you can't have ansible and ansible-base together).

Change-Id: I5f3fc93e6ddd611f319fa269e122ed576c9cb378

test-requirements.txt

@@ -1,22 +0,0 @@
-# The order of packages is significant, because pip processes them in the order
-# of appearance. Changing the order has an impact on the overall integration
-# process, which may cause wedges in the gate later.
-hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
-bashate>=0.2 # Apache-2.0
-PyYAML>=3.10.0 # MIT
-ansible-lint>=4.1.0
-openstacksdk
-zuul-sphinx>=0.2.3
-testtools
-mock
-# testinfra 1.17.0 has a broken wheel that won't install under python3
-# testinfra 3.0.0 switched the ansible backend, but broke ipv6 handling
-testinfra!=1.17.0,!=3.0.0
-pytest-html # MPL-2.0
-# testinfra's ansible backend actually requires paramiko, but it's not
-# specified.  After
-#  https://github.com/philpep/testinfra/pull/454
-# releases we can do testinfra[ansible] here instead
-ansible>=2.8.0
-paramiko
-

tox.ini

@@ -7,9 +7,16 @@ skipsdist = True
 basepython = python3
 usedevelop = True
 install_command = pip install {opts} {packages}
-deps = -r{toxinidir}/test-requirements.txt
 
 [testenv:linters]
+deps =
+  hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
+  bashate>=0.2 # Apache-2.0
+  PyYAML>=3.10.0 # MIT
+  ansible-lint>=4.1.0
+  openstacksdk
+  testtools
+  mock
 whitelist_externals = bash
 setenv =
   ANSIBLE_LIBRARY= {toxinidir}/tools/fake-ansible/library
@@ -25,14 +32,18 @@ commands =
   python3 -m unittest playbooks/roles/install-ansible/files/inventory_plugins/test_yamlgroup.py
   bash -c "find roles playbooks -type f -regex '.*.y[a]?ml' -print0 | xargs -t -n1 -0 ansible-lint"
 
-[testenv:venv]
-commands = {posargs}
-
 [testenv:docs]
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -E -b html doc/source doc/build/html
 
 [testenv:testinfra]
+deps =
+  # testinfra 1.17.0 has a broken wheel that won't install under python3
+  # testinfra 3.0.0 switched the ansible backend, but broke ipv6 handling
+  testinfra!=1.17.0,!=3.0.0
+  ansible-base
+  pytest-html # MPL-2.0
+
 # This environment assumes a gate-hosts.yaml file has been written.
 passenv =
   TESTINFRA_EXTRA_DATA

zuul.d/system-config-run.yaml

@@ -62,6 +62,7 @@
         - name: focal
           label: ubuntu-focal
     files:
+      - tox.ini
       - playbooks/
       - roles/
       - testinfra/