Update ntp_dirname to proper deprecation

Author: DavidS

lib/puppet/functions/ntp_dirname.rb

@@ -0,0 +1,10 @@
+Puppet::Functions.create_function(:ntp_dirname, Puppet::Functions::InternalFunction) do
+  dispatch :ntp_dirname do
+    scope_param
+    optional_repeated_param 'Any', :args
+  end
+  def ntp_dirname(scope, *args)
+    call_function('deprecation', 'ntp_dirname_removal', "ntp_dirname(): this function is deprecated and will be removed at a later time.")
+    scope.send("function_ntp_dirname", args)
+  end
+end

lib/puppet/parser/functions/ntp_dirname.rb

@@ -7,7 +7,7 @@ module Puppet::Parser::Functions
     raise(Puppet::ParseError, "ntp_dirname(): Wrong number of arguments " +
       "given (#{arguments.size} for 1)") if arguments.size < 1
 
-    warning("ntp_dirname(): this function is deprecated and will be removed at a later time.")
+    function_deprecation([:ntp_dirname_removal, 'ntp_dirname(): this function is deprecated and will be removed at a later time.'])
 
     path = arguments[0]
     return File.dirname(path)