Add zuul to test-requirements for linting

The linters env is picking up zuul-jobs content too, so we need to add
zuul to get the zuul_ modules ... otherwise ansible-lint has a sad.

Add zuul to test-requirements like is done in zuul-jobs. Then point the
library path to zuul/ansible/library in the site-packages dir from tox
so that we pick up the right files.

Change-Id: I7a4f0159290d67354e0a73365091a0d1718762fd

bindep.txt

@@ -5,3 +5,12 @@ libffi-devel [test platform:rpm]
 libffi-dev [test platform:dpkg]
 libssl-dev [platform:dpkg]
 openssl-devel [platform:rpm]
+python3-dev [compile test platform:dpkg platform:apk]
+python3-devel [compile test platform:rpm]
+libre2-dev [compile test platform:dpkg]
+libre2-4 [platform:ubuntu-bionic]
+libre2-3 [platform:debian-stretch]
+libre2-1v5 [platform:ubuntu-xenial]
+re2-devel [compile test platform:rpm]
+re2-dev [platform:apk]
+re2 [platform:rpm platform:apk]

test-requirements.txt

@@ -4,6 +4,7 @@
 
 hacking>=0.12.0,<0.13 # Apache-2.0
 
+zuul
 ansible<2.4.0
 ansible-lint
 bashate>=0.2

tox.ini

@@ -26,6 +26,8 @@ passenv =
   # to export ANSIBLE_ROLES_PATH pointing to the currect repos.
   # see openstack-zuul-jobs-linters job for more information.
   ANSIBLE_ROLES_PATH
+setenv =
+  ANSIBLE_LIBRARY= {envsitepackagesdir}/zuul/ansible/library
 commands =
   flake8 {posargs}
   # Ansible lint

zuul.d/jobs.yaml

@@ -1190,6 +1190,7 @@
       - openstack-infra/project-config
       - openstack-infra/system-config
       - openstack-infra/zuul-jobs
+      - openstack-infra/zuul
     vars:
       tox_envlist: linters
       tox_environment: