Fix installation of Openstack CLI tools

The Openstack CLI tools need the following libraries to be installed:
libssl-dev/openssl-devel, libffi-dev, and python-dev/python-devel

Change-Id: Idc61520ff28063fd10704e205bc93a5a08399f00
Implements: blueprint infra-data-back-up
Merge "Fix installation of Openstack CLI tools"