Do not provide example integrations as classes

[smortex]

The module configure PuppetBoard, but also has classes to setup Apache
configuration to serve it. Unfortunately, such configuration is very
site specific, and providing it in the module confuse users who discover
that their setup is exposed to the internet without authentication.

At some point, LDAP authentication was added which partially fix the
issue, but only for users who can authenticate their users with LDAP.

It is also quite common to use the Puppet CA to authenticate clients,
or use Passenger instead of wsgi, or use another web server than apache,
and any combination of this, making a generic solution not viable.

Remove all these apache-specific examples from the module classes, and
provide examples configuration for different setups. It will be easier
to add new integration examples by just dropping more files in the
example directory, without cluttering the module with complex mostly
private code.

[smortex]

Hopefully this will help to avoid the number of PuppetBoard instances exposed on the Internet to continue to be so common. Here is a report from shodan for the trend of the number of results for the search "http.title:puppetboard"