feat(passenger): inc config, snippets, servers, etc

- currently you're forced to define extra states if you opt to install nginx with passenger,
 if you want the same outcome for passenger and nginx installs with equivalent config
- passenger is an extra module on top of nginx, makes no sense to end up with less configuration by default

nginx/passenger.sls

 {% if salt['grains.get']('os_family') in ['Debian', 'RedHat'] %}
 include:
   - nginx.pkg
+  - nginx.config
   - nginx.service
+  {%- if nginx.snippets is defined %}
+  - nginx.snippets
+  {%- endif %}
+  - nginx.servers
+  - nginx.certificates
 
 passenger_install:
   pkg.installed: