Improve support for complete removal of Jenkins

[php-coder]

I tried to purge Jenkins from my system, but it outputs a lot of warnings:

Notice: /Stage[main]/Jenkins::Package/Package[jenkins]/ensure: ensure changed '1.509.3' to 'purged'
Error: /Stage[main]/Jenkins::Config/Jenkins::Sysconfig[HTTP_PORT]/File_line[Jenkins sysconfig setting HTTP_PORT]: Could not evaluate: No such file or directory - /etc/default/jenkins
Notice: /User[jenkins]: Dependency File_line[Jenkins sysconfig setting HTTP_PORT] has failures: true
Warning: /User[jenkins]: Skipping because of failed dependencies
Notice: /Group[jenkins]: Dependency File_line[Jenkins sysconfig setting HTTP_PORT] has failures: true
Warning: /Group[jenkins]: Skipping because of failed dependencies
Notice: /Stage[main]/Jenkins::Plugins/Jenkins::Plugin[greenballs]/File[/var/lib/jenkins]: Dependency File_line[Jenkins sysconfig setting HTTP_PORT] has failures: true
Warning: /Stage[main]/Jenkins::Plugins/Jenkins::Plugin[greenballs]/File[/var/lib/jenkins]: Skipping because of failed dependencies
Notice: /Stage[main]/Jenkins::Plugins/Jenkins::Plugin[greenballs]/File[/var/lib/jenkins/plugins]: Dependency File_line[Jenkins sysconfig setting HTTP_PORT] has failures: true
Warning: /Stage[main]/Jenkins::Plugins/Jenkins::Plugin[greenballs]/File[/var/lib/jenkins/plugins]: Skipping because of failed dependencies
[...]
Notice: /Stage[main]/Jenkins::Service/Service[jenkins]: Dependency File_line[Jenkins sysconfig setting HTTP_PORT] has failures: true
Warning: /Stage[main]/Jenkins::Service/Service[jenkins]: Skipping because of failed dependencies
Notice: /Stage[main]/Jenkins/Anchor[jenkins::end]: Dependency File_line[Jenkins sysconfig setting HTTP_PORT] has failures: true
Warning: /Stage[main]/Jenkins/Anchor[jenkins::end]: Skipping because of failed dependencies

It also only removed a package and jenkins user but leaved other artifacts on my system:

• jenkins group
• key for jenkins repository
• /etc/apt/sources.list.d/jenkins.list file

This is my puppet code I used for removal:

class { 'jenkins':
  version     => 'purged',
  lts         => 1, # use stable version
  repo        => 1, # install from repository
  config_hash => {
    'HTTP_PORT' => { 'value' => '8000' }
  },
  plugin_hash => {
    'greenballs'            => { version => '1.12'    }
  }
}

[jlambert121]

Right now this functionality doesn't exist in the module, a PR would be welcome though!