(SERVER-112) Refactor ruby settings initialization
(SERVER-112) Refactor ruby settings initialization

This commit just introduces some new methods to help take care
of Ruby settings initialization, in preparation for cleaning
up `master.rb` a bit.

fpringvaldsen/puppet-server,nfagerlund/puppet-server,jpinsonault/puppetserver,camlow325/puppetserver,puppetlabs/puppet-server,camlow325/puppet-server,jpinsonault/puppetserver,waynr/puppet-server,er0ck/puppetserver,cprice404/puppetserver,kylog/puppet-server,stahnma/puppet-server,dankreek/puppet-server,kylog/puppet-server,stahnma/puppet-server,puppetlabs/puppetserver,dankreek/puppet-server,rlinehan/puppet-server,16nsk/puppet-server,cprice404/puppet-server,briancain/puppet-server,camlow325/puppetserver,puppetlabs/puppetserver,briancain/puppet-server,puppetlabs/puppet-server,er0ck/puppetserver,jpinsonault/puppet-server,waynr/puppetserver,camlow325/puppetserver,nicklewis/puppet-server,shrug/puppet-server,jeffmccune/puppet-server,shrug/puppet-server,erikPrime/puppetserver,rlinehan/puppetserver,shrug/puppet-server,briancain/puppet-server,dankreek/puppet-server,camlow325/puppet-server,nfagerlund/puppet-server,camlow325/puppetserver,cprice404/puppet-server,16nsk/puppet-server,erikPrime/puppetserver,er0ck/puppetserver,waynr/puppetserver,waynr/puppet-server,jpinsonault/puppet-server,stahnma/puppet-server,cgvarela/puppet-server,camlow325/puppet-server,cprice404/puppetserver,puppetlabs/puppetserver,erikPrime/puppet-server,puppetlabs/puppetserver,nfagerlund/puppet-server,nicklewis/puppet-server,er0ck/puppetserver,rlinehan/puppetserver,fpringvaldsen/puppet-server,erikPrime/puppet-server,nicklewis/puppet-server,jeffmccune/puppet-server,rlinehan/puppetserver,ahpook/puppet-server,fpringvaldsen/puppet-server,rlinehan/puppetserver,16nsk/puppet-server,ahpook/puppet-server,waynr/puppet-server,cgvarela/puppet-server,jpinsonault/puppet-server,cprice404/puppet-server,puppetlabs/puppet-server,cprice404/puppetserver,cgvarela/puppet-server,jpinsonault/puppetserver,shrug/puppet-server,erikPrime/puppetserver,jeffmccune/puppet-server,ahpook/puppet-server,erikPrime/puppet-server,rlinehan/puppet-server,waynr/puppetserver,rlinehan/puppet-server,kylog/puppet-server