Create postgres user fails on ubuntu 15.10 target

Not sure if I am doing something wrong, but using brew-installed ansible on El Capitan as well as pip-installed ansible on a Ubuntu 14.04 server, the initial setup.yml fails on an Ubuntu 15.10 target on the step for creating the PostgreSQL user.

Solution was to add a task to ensure the service is started.

[HashNuke]

@GTcode Will look into this.