Add unit tests and travis-ci support

This patch includes some very basic and initial unit testing using rspec-puppet
and for the case of facts, just normal rspec.

I've taken a very light approach here as rspec-puppet can be quite combinatorial
when one gets carried away. For now I've just added basic compile failure
detection effectively for classes and defined resources. As we continue to work
on the code and find regressions this work can be expanded.

For facts and functions I've also taken a basic approach for now.

One little thing I did change, was the strange string that the fact returns
when the default version is undefined. Instead of an error message I've just
returned the string 'unknown' which is more in line with other facts I've seen
in the wild, and to be quite honest 'unknown' is fairly self-explantory. Since
a fact isn't an error reporting message this seemed more appropriate, and looked
nicer in the rspec test.

As far as travis-ci support, I've added the same configuration that @jmmcune
came up with for stdlib which is pretty light and reasonable standard now we
propogated that to 4 or so other modules in the puppetlabs/ namespace. It should
work out of the box.

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #115 from kbarber/ticket/master/unit_tests

Add unit tests and travis-ci support
Add locale parameter support

This adds the parameter 'locale' to the 'postgresql' class so we have a global
default, and adds it two the defined resources 'postgresql::db' and
'postgresql::database'. This allows users to either:

* Defined a global default for the cluster
* Define a per-database default

As a side-effect I had to make sure 'charset' was also exposed in a similar
manner as some locales need a particular charset to work.

Tests were added to test both the 'createdb' case and 'initdb' case for Redhat,
and some refactoring was done to make the existing non_default test area use
heredocs so my manifests and test code was kept close together. As apposed to
entirely different files and places in the directory structure.

I cleaned up the related execs a little bit, adding logoutput => on_failure
where needed so we can debug failures. Beforehand execs just 'failed', but
now we should be able to get better feedback from failed execs helping support.

I also add intention comments in parts of the Puppet code that I touched where
it made sense.

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #108 from kbarber/ticket/master/add_locale_parameter

Add locale parameter support