Adding zuul jobs for new repo

This job adds a single linters tox target.

The linters target is an aggregation of linters for
this repo including:
 - bashate
 - flake8

Note: this repo does not contain any bash or python code,
so those linter checks merely protect against future
additions of those types of files.

Other linters such as yamllint can be added to this
repo by later commits.

This commit also adds basic contributing and hacking docs.

Change-Id: I38531aa125a6004c91a7286eb878eb7b1f188476
Story: 2006166
Task: 36543
Signed-off-by: Al Bailey <Al.Bailey@windriver.com>

.gitignore

@@ -0,0 +1 @@
+.tox

.zuul.yaml

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+---
+- project:
+    check:
+      jobs:
+        - openstack-tox-linters
+    gate:
+      jobs:
+        - openstack-tox-linters

CONTRIBUTING.rst

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+If you would like to contribute to the development of OpenStack,
+you must follow the steps in this page:
+
+   https://docs.openstack.org/infra/manual/developers.html
+
+Once those steps have been completed, changes to OpenStack
+should be submitted for review via the Gerrit tool, following
+the workflow documented at:
+
+   https://docs.openstack.org/infra/manual/developers.html#development-workflow
+
+Pull requests submitted through GitHub will be ignored.
+
+Bugs should be filed in Launchpad:
+
+   https://bugs.launchpad.net/starlingx

HACKING.rst

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+StarlingX Helm-Charts Style Commandments
+========================================
+
+- Step 1: Read the OpenStack style commandments
+  https://docs.openstack.org/hacking/latest/
+- Step 2: Read on
+
+Helm-Charts Specific Commandments
+---------------------------------
+
+None so far
+
+Running tests
+-------------
+The approach to running tests is to simply run the command ``tox``. This will
+create virtual environments, populate them with dependencies and run all of
+the tests that OpenStack CI systems run.

requirements.txt

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+# Nothing

test-requirements.txt

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+# hacking pulls in flake8
+hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
+bashate >= 0.2

tox.ini

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+[tox]
+envlist = linters
+minversion = 2.3
+skipsdist = True
+sitepackages=False
+
+[testenv]
+install_command = pip install -U {opts} {packages}
+setenv =
+   VIRTUAL_ENV={envdir}
+   OS_STDOUT_CAPTURE=1
+   OS_STDERR_CAPTURE=1
+   OS_DEBUG=1
+   OS_LOG_CAPTURE=1
+deps =
+  -r{toxinidir}/requirements.txt
+  -r{toxinidir}/test-requirements.txt
+whitelist_externals =
+  bash
+
+[testenv:bashate]
+# Treat all E* codes as Errors rather than warnings using: -e 'E*'
+commands =
+  bash -c "find {toxinidir}                    \
+         -not \( -type d -name .?\* -prune \) \
+         -type f                              \
+         -not -name \*~                       \
+         -not -name \*.md                     \
+         -name \*.sh                          \
+         -print0 | xargs -r -n 1 -0 bashate -v   \
+         -e 'E*'"
+
+[flake8]
+max-line-length=80
+
+[testenv:flake8]
+commands =
+  flake8
+
+[testenv:linters]
+commands =
+    {[testenv:bashate]commands}
+    {[testenv:flake8]commands}