RBAC Patch 1: policies and common files

This commit aims to suggest a set of default policies for user
management on stx-openstack. We suggest the creation of the project_admin
and project_readonly roles and provide some policies to fine tune the
access control over the Openstack services to those roles, as described
on README.md.

Also, we provide a set of tests to ensure the policies and permissions
are all working as expected on site for the cloud administrators.

Story: 2008910
Task: 42501

Signed-off-by: Heitor Matsui <heitorvieira.matsui@windriver.com>
Signed-off-by: Thiago Brito <thiago.brito@windriver.com>
Co-authored-by: Miriam Yumi Peixoto <miriam.yumipeixoto@windriver.com>
Co-authored-by: Leonardo Zaccarias <leonardo.zaccarias@windriver.com>
Co-authored-by: Rogerio Oliveira Ferraz <rogeriooliveira.ferraz@windriver.com>
Change-Id: I4040fe9f7be94ea7e0eb208579b2d5aa7579a8b1

enhanced-policies/.gitignore

@@ -0,0 +1,55 @@
+*.py[cod]
+.venv
+
+# C extensions
+*.so
+
+# Packages
+.eggs
+*.egg
+*.egg-info
+dist
+build
+eggs
+parts
+bin
+var
+sdist
+develop-eggs
+.installed.cfg
+lib
+lib64
+
+# Installer logs
+pip-log.txt
+
+# Unit test / coverage reports
+.coverage
+cover/*
+.tox
+nosetests.xml
+.testrepository
+.stestr
+
+# Translations
+*.mo
+
+# Mr Developer
+.mr.developer.cfg
+.project
+.pydevproject
+
+# Complexity
+output/*.html
+output/*/index.html
+
+# Sphinx
+doc/build
+
+# pbr generates these
+AUTHORS
+ChangeLog
+
+# Editors
+*~
+.*.swp