Add validations profile for tripleo
Add validations profile for tripleo

This adds the tripleo::profile::base::validations profile which sets up
the `validations` user and installs the openstack-tripleo-validations
package.

Change-Id: Ib2b1ddcda3a41cb7263171d3024f05ba8bfd2f28

openstack/puppet-tripleo,openstack/puppet-tripleo,openstack/puppet-tripleo