Changes related to customization of 'admin' console.
     1. Added new attributes related to 'admin' console customization.
     2. Added 'template' resource related to 'admin' console customization in default 'recipe'.
     3. Removed few changes which already existed related to 'transporters'. These changes will be submitted in next commit.
     4. Added new template files 'jetty-realm.properties.erb','jetty.xml.erb' related to customization of 'admin' console.
     5. Added 'chefspec' test case 'activemq_spec.rb'.
     6. Added 'ServerSpec' test case 'activemq_spec.rb'.