add darwin/osx support to slave class

[adamcstephens]

This utilizes the existing defaults file, along with a wrapper script and launchd service. There is no wget by default on OSX so use curl there (could be used everywhere, or instead use a puppet module such as archive).

[jenkinsadmin]

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[rtyler]

Is there any reason for these examples to be commented out?

[adamcstephens]

I'm still learning rspec, and can't figure out how to get the tests to ignore java install on darwin.

Failures:

  1) jenkins::slave Darwin with slave_name behaves like using slave_name should contain File[/home/jenkins-slave/jenkins-slave] with content =~ /^CLIENT_NAME="jenkins-slave"$/
     Failure/Error: it { should contain_file(slave_runtime_file).with_content(/^CLIENT_NAME="jenkins-slave"$/) }
     Puppet::Error:
       Could not find resource 'Class[Java]' for relationship on 'Service[jenkins-slave]' on node myosx.local
     Shared Example Group: "using slave_name" called from ./spec/classes/jenkins_slave_spec.rb:80
     # ./spec/classes/jenkins_slave_spec.rb:43:in `block (3 levels) in <top (required)>'

[rtyler]

so the puppetlabs/java module doesn't support Darwin so I think part of why this is failing.

[rtyler]

@adamcstephens overall, looking very good! some minor comments that I've added; can't wait to get this merged

[rtyler]

I'm going to merge this and try to clean it up a bit myself before release

[adamcstephens]

Ok, sorry. I started on the refactor earlier in the week but work got the better of me.

[rtyler]

@adamcstephens no big deal, this has since been released :)