Add in the ability to call ansible-lint from tox.

The list of all ansible-lint error codes is documented here:
https://docs.ansible.com/ansible-lint/rules/default_rules.html

The failing ansible-lint checks are suppressed by the skip_list
entry in .ansible-lint file.  Those should be fixed in followup
commits by an ansible expert.

The tox target can be invoked locally by: tox -e ansible-lint

The ansible-lint target is automatically included in the linters
tox targer, which is already inoked by zuul.

Story: 2004515
Task: 37144
Change-Id: I9a3e90aebdf6915f3a55b894bda2cd0919b073fd
Signed-off-by: Al Bailey <Al.Bailey@windriver.com>

.ansible-lint

@@ -0,0 +1,28 @@
+# exclude_paths:
+
+parseable: true
+
+quiet: true
+
+# rulesdir:
+
+# All errors below should be cleaned up in ansible and removed from the skip_list
+skip_list:
+  - '204' # [E204] Lines should be no longer than 160 chars
+  - '206' # [E206] Variables should have spaces before and after: {{ var_name }
+  - '301' # [E301] Commands should not change things if nothing needs doing
+  - '303' # [E303] systemctl used in place of systemd module
+  - '305' # [E305] Use shell only when shell functionality is required
+  - '306' # [E306] Shells that use pipes should set the pipefail option
+  - '501' # [E501] become_user requires become to work as expected
+  - '502' # [502] All tasks should be named
+  - '504' # [E504] Do not use 'local_action', use 'delegate_to: localhost'
+  - '601' # [E601] Don't compare to literal True/False
+  - '602' # [E602] Don't compare to empty string
+  - '701' # [E701] No 'galaxy_info' found
+
+# tags:
+
+use_default_rules: true
+
+verbosity: 1

test-requirements.txt

@@ -1,4 +1,5 @@
+ansible-lint
 bashate >= 0.2
+flake8 >= 2.5.4 # MIT
 PyYAML >= 3.1.0
 yamllint >= 0.5.2
-flake8 >= 2.5.4 # MIT

tox.ini

@@ -15,6 +15,7 @@ deps = -r{toxinidir}/test-requirements.txt
 basepython = python3
 whitelist_externals = bash
 commands =
+  {[testenv:ansible-lint]commands}
   bash -c "find {toxinidir}          \
          -not \( -type d -name .?\* -prune \) \
          -type f                              \
@@ -28,6 +29,13 @@ commands =
             -o -name '*.yml' \
             -print0 | xargs -0 yamllint"
 
+[testenv:ansible-lint]
+basepython = python3
+whitelist_externals = bash
+# ansible-lint error checks are suppressed/skipped through the .ansible-lint file
+commands =
+  bash -c "ls playbookconfig/src/playbooks/*.yml | xargs --no-run-if-empty ansible-lint"
+
 [testenv:pep8]
 basepython = python3
 usedevelop = False