(SERVER-511) Update version to 2.0.0-rc4
(SERVER-511) Update version to 2.0.0-rc4

If this commit passes through CI then this change in will be tagged as
2.0.0-rc4

This commit is skipping the pull request process so that builds aren't
automatically triggered for the commit.  This version needs to be
manually kicked.

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