Add app-rook-ceph repo setup for FluxCD App

Story: 2011066
Task: 49782

Change-Id: Ia31587b2afe14516c0b631e7a058446bc7b1bfaa
Signed-off-by: Caio Correa <caio.correa@windriver.com>

.zuul.yaml

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

README.md

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+# app-rook-ceph
+App-rook-ceph fluxCD app
+
+### About app-rook-ceph
+Rook is a Ceph orchestrator providing a containerized solution for Ceph Storage. This application tracks the latest compatible upstream version of Rook and packs it targeting StarlingX platforms on fresh instalations. For systems that already have a Ceph backend installed, there's a [migration app](https://opendev.org/starlingx/rook-ceph) available.
+
+### Installation Guide
+For instructions on how to build and install app-rook-ceph, follow the [StarlingX Rook Ceph App installation guide](https://wiki.openstack.org/wiki/StarlingX/Containers/Applications/app-rook-ceph).
+
+
+#### References
+[StarlingX](https://www.starlingx.io/)
+
+[Rook Ceph](https://rook.io/)
+
+[Migration App](https://opendev.org/starlingx/rook-ceph)

requirements.txt

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+# Nothing

test-requirements.txt

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+# hacking pulls in flake8
+hacking>=1.1.0,<=2.0.0 # Apache-2.0
+bashate >= 0.2

tox.ini

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+[tox]
+envlist = linters
+minversion = 2.9
+skipsdist = True
+sitepackages=False
+
+[testenv]
+basepython = python3
+install_command = pip install -U \
+    {opts} {packages} \
+    -c{env:TOX_CONSTRAINTS_FILE:https://opendev.org/starlingx/root/raw/branch/master/build-tools/requirements/debian/upper-constraints.txt}
+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
+allowlist_externals =
+  bash
+
+[testenv:flake8]
+basepython = python3
+description = Dummy environment to allow flake8 to be run in subdir tox
+
+[testenv:pylint]
+basepython = python3
+description = Dummy environment to allow pylint to be run in subdir tox
+
+[testenv:metadata]
+basepython = python3
+description = Dummy environment to allow sysinv-app to be run in subdir tox
+
+[testenv:bandit]
+basepython = python3
+description = Dummy environment to allow bandit to be run in subdir tox
+
+[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:linters]
+commands =
+    {[testenv:bashate]commands}