Processes the login of a user to gain access to the GeoServer Configuration.
Currently the defaults are "admin" for username, "geoserver" for password,
case insensitive.
MapPreviewAction Sep 26, 2005 Purpose:
Gathers up all the FeatureTypes in use and returns the informaion to the
.jsp .
It will also generate requests to the WMS "openlayers" output format.