CI: add ansible-lint to linters job

Adapted from kolla-ansible setup.

Change-Id: I89fb9ccf03e445d1830dd5d525021cc5679d54a1

.ansible-lint

@@ -0,0 +1,15 @@
+---
+use_default_rules: true
+skip_list:
+  # [E503] Tasks that run when changed should likely be handlers
+  # TODO(mnasiadka): Rework roles to do handlers instead of when: *.changed
+  - no-handler
+  # [E208] permissions not mentioned
+  # FIXME(mnasiadka): Rework file/template to include permissions
+  - risky-file-permissions
+  # [unnamed-task] All tasks should be named
+  # FIXME(mgoddard): Add names to all tasks
+  - unnamed-task
+  # [ignore-errors] Use failed_when and specify error conditions instead of using ignore_errors
+  # FIXME(mgoddard): Use failed_when instead of ignore_errors
+  - ignore-errors

test-requirements.txt

@@ -1,4 +1,5 @@
 # linting
+ansible-lint>=4.2.0,!=4.3.0 # MIT
 bandit>=1.1.0 # Apache-2.0
 bashate>=0.5.1 # Apache-2.0
 doc8>=0.6.0 # Apache-2.0

tox.ini

@@ -89,6 +89,7 @@ commands =
   {[testenv:bandit]commands}
   {[testenv:yamllint]commands}
   {[testenv:ansible-sanity]commands}
+  {[testenv:ansible-lint]commands}
 
 [testenv:pep8]
 deps = {[testenv:linters]deps}
@@ -123,3 +124,8 @@ commands = yamllint -s .
 [testenv:ansible-sanity]
 deps = {[testenv:linters]deps}
 commands = {toxinidir}/tools/run-ansible-sanity.sh {toxinidir}
+
+[testenv:ansible-lint]
+deps = {[testenv:linters]deps}
+commands =
+  ansible-lint -p