Merge pull request #608 from mhaskel/MODULES-1923

MODULES-1923 - Use the correct command with Puppet < 3.4

lib/puppet/provider/postgresql_psql/ruby.rb

@@ -51,8 +51,7 @@ Puppet::Type.type(:postgresql_psql).provide(:ruby) do
     command = command.join ' '
     environment = get_environment
     if Puppet::PUPPETVERSION.to_f < 3.4
-      require 'puppet/util/execution'
-      Puppet::Util::Execution.withenv environment do
+      Puppet::Util.withenv environment do
         Puppet::Util::SUIDManager.run_and_capture(command, user, group)
       end
     else