jenkins::slave should not depend on jenkins

[jhoblitt]

I accidentally introduced a dependency when converting to puppet/archive for all downloads.

Warning: Scope(Class[Jenkins::Slave]): Could not look up qualified variable '::jenkins::proxy_server'; class ::jenkins has not been evaluated

[jhoblitt]

Related to #248

[rtyler]

Heh, does this mean that every build node has a Jenkins master provisioned on it? 👅

[mprasil]

Seeing this won't be out until 1.7, is there some workaround to specify proxy for slave while avoiding duplicate declaration?

[jyaworski]

This looks like it comes from here:

https://github.com/jenkinsci/puppet-jenkins/blob/master/manifests/slave.pp#L254

getvar could be used, but that's a hack. This would still fail strict_variables testing.

[jhoblitt]

Resolved by #612