Property Tag gets a cached PropertiesBean and converts it to a map very time the tag is called

Property Tag gets a cached PropertiesBean and converts it to a map very time the tag is called that makes it rather expensive specially if there are a lot of items in the PropertiesBean. So i quickly wipe up a new Implementation of PropertiesManager which caches Maps rather than PropertiesBeans. In the performance test I set up it improved the performance of the page by 46%. please find the patch file attached to this ticket.