Update required packages to run exerstack from standalone node

This PR updates required packages to support running exerstack from standalone node.

- explicitly stated all client tool packages (python-novaclient, python-swiftclient, etc.), even though some pull in others
- added mysql, which is required by keystone.sh and keystone-manage.sh (however this doesn't support running remotely)
- removed openstack-glance, openstack-keystone from Red Hat folsom, since cannot see why these are needed (keystone-manage.sh tests do need keystone-manage, but this is only executed < essex-e4)