Prior to this commit, the deprecated `manage_redhat_firewall` param
was not actually backward compatible because there were several
cases where we couldn't tell the difference between the user
explicitly specifying `false` for that parameter as opposed to
not specifying it at all. This commit is a bit ugly because it
sets some defaults to `undef` in order to allow us to tell the
difference between the two cases, but it should resolve backwards
compatibility issues.
Prior to this commit, if you allowed the puppetdb module
to manage postgres for you, it would always try to manage
the firewall for the postgres port on redhat systems.
This commit exposes that as a parameter in a few more
spots, and passes it through to the postgres module.
This commit does the following:
* Use the new inifile module to manage puppet.conf
* More comprehensive management of config files
* Validate database connectivity before applying puppetdb
config changes
* Validate puppetdb connectivity before applying puppet
master config changes
* Documentation
