This is the standard (until 1.4.x) configuration mode based on owning collection handle
Style name is case insensitive.
author: Andrea Bollini version: $Revision: 1 $
Get the style associated with the handle from the in-memory map. If the map is not already
initialized read it from dspace.cfg
Check for the style configuration: return the default style if no configuration has found.
Parameters: handle - the specific style or the default if not properly defined