Add simple script to setup mysql and postgresql databases, this script
can be run by users during testing and will be run by CI systems for
specific setup before running unit tests. This is exactly what is
currently done by OpenStack CI in project-config.
This allows to change in project-config the python-db jobs to
python-jobs since python-jobs will call this script initially.
See also
http://lists.openstack.org/pipermail/openstack-dev/2016-November/107784.html
Needed-By: I32f02e904d36ed21a22a1e535b35a15318e1ee16
Change-Id: I70e83ea22be75e6c31428f56c6e68c49976d1eab
08f2401ddb