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

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

This repo is primarily GO code. The zuul and tox jobs
will be more comprehensive in later commits.

This commit also adds basic contributing and hacking docs.

Change-Id: I3b760f16043ce0f0444cd153e17aa262ab30328a
Story: 2006166
Task: 36542
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 Containers Style Commandments
+=======================================
+
+- Step 1: Read the OpenStack style commandments
+  https://docs.openstack.org/hacking/latest/
+- Step 2: Read on
+
+Utilities 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*'"
+
+[testenv:flake8]
+commands =
+  flake8
+
+[testenv:linters]
+commands =
+    {[testenv:bashate]commands}