Add template in the jenkins::job

[oloc]

I propose this improvement to add an option to avoid copy/paste files.

Very helpfull when we use something like:

  $jobs = hiera('jenkins::jobs')
  create_resources(jenkins::job, $jobs)

And a hiera like this one:

jenkins::jobs :
  petclinic-build:
    jobname: 'petclinic-build'
    config: ''
    source: 'g10b/petclinic-build.xml'

[rtyler]

I like it! Would it be possible for you to add an rspec-puppet test case to validate the behavior before I merge it?

[jenkinsadmin]

Thank you for a pull request! Please check this document for how the Jenkins project handles pull requests

[oloc]

I'm not comfortable with rspec-puppet. You have to check and improve my last commit. I might be wrong.

[rtyler]

@oloc No worries! I'll take a look and tweak this as necessary for merging