New modules for the HP Vertica Analytics Database

The following new modules for the HP Vertica Analytics Database (http://www.vertica.com) are based on postrgresql_db and postrgresql_user modules:
- vertica_facts
- vertica_schema
- vertica_user

If you decide to add to Ansible, please also consider adding to the HP Haven Marketplace (https://haven.hpwsportal.com/catalog.html#/Category/%7B%22categoryId%22%3A10073%7D/Show).