Don't monkey patch JSON

[traylenator]

Exact same bug is present in the sorted json function

voxpupuli/puppet-consul#452

Currently

Sep  6 07:38:29 p05798818k29116 puppet-agent[27271]: Could not retrieve catalog from remote server: Error 500 on SERVER: Server Error: Evaluation Error: Error while evaluating a Function Call, undefined method `parse' for Puppet::Pops::Loader::RubyFunctionInstantiator::JSON:Module (file: /mnt/puppetnfsdir/environments/production/modules/hardware/manifests/physical.pp, line: 42, column: 16) on node p05798818k29116.cern.ch

is observed.