Feature/install opentripplanner

If these roles are dependencies of the `cac-tripplanner.otp` role, I usually try to keep them inside the `meta/main.yml` file under `dependencies`:

```yaml
---
dependencies:
  - { role: "azavea.python", python_development: True }
  - { role: "azavea.pip" }
  - { role: "azavea.git", when: developing_or_testing }
  - { role: "azavea.postgresql-support" }
  - { role: "azavea.daemontools" }
  - { role: "azavea.nginx", nginx_delete_default_site: True }
```