Add 'implementation' fact to agent and server.

As specified in OpenVoxProject/planning#39, the agent will now make its
implementation flavor known to the compiler through a built-in fact, as
will the server (through a server fact).

(cherry picked from commit 7b34e65)

Author: Felix Frank

lib/puppet/node/facts.rb

@@ -27,6 +27,7 @@ def save(instance, key = nil, options={})
   attr_accessor :name, :values, :timestamp
 
   def add_local_facts
+    values["implementation"] = "openvox"
     values["clientcert"] = Puppet.settings[:certname]
     values["clientversion"] = Puppet.version.to_s
     values["clientnoop"] = Puppet.settings[:noop]

lib/puppet/node/server_facts.rb

@@ -4,6 +4,9 @@ class Puppet::Node::ServerFacts
   def self.load
     server_facts = {}
 
+    # Add implementation information
+    server_facts["implementation"] = "openvox"
+
     # Add our server Puppet Enterprise version, if available.
     pe_version_file = '/opt/puppetlabs/server/pe_version'
     if File.readable?(pe_version_file) and !File.zero?(pe_version_file)