Stop installing i18n module from the forge during beaker tests

The 'should_find_existing_production_environment' test is useful and
will be re-enabled later using a module fixture.

(cherry picked from commit 72040f8)

Author: joshcooper

acceptance/tests/environment/should_find_existing_production_environment.rb

@@ -1,5 +1,5 @@
 test_name "should find existing production environment"
-tag 'audit:high'
+tag 'audit:medium'
 
 require 'puppet/acceptance/i18ndemo_utils'
 extend Puppet::Acceptance::I18nDemoUtils

acceptance/tests/i18n/modules/puppet_agent.rb

@@ -1,7 +1,7 @@
 test_name 'C100565: puppet agent with module should translate messages' do
   confine :except, :platform => /^solaris/ # translation not supported
 
-  tag 'audit:high',
+  tag 'audit:medium',
       'audit:acceptance'
 
   require 'puppet/acceptance/environment_utils.rb'