Disable EPEL and use only RDO repos
Disable EPEL and use only RDO repos

While installing with this playbook i encountered errors when installing
test-requirements with pip. The error was related to pyparsing that had to
be updated to at least 2.2.0 for satisfying the dependencies of
python-keystoneclient (oslo.utils depends on pyparsing).
Centos provides 1.5.x version of pyparsing, instead RDO repos provides
an updated version.

Additionally using RDO repos and EPEL is discouraged, due to updates in
EPEL breaking backwards compatibility.
See: https://docs.openstack.org/ocata/install-guide-rdo/environment-packages.html#prerequisites

thiagodasilva/ansible-saio