This method connects to rmi-registry on specified, host, port and service
and tries to receive a xml-document which is saved to global
variable xmlDocument if the attempt was succesful otherwise
an exception is thrown.
This method will be responsible for the transformation of the xmlDocument
with the StreamSource (generated from xslt-stylesheet) in a html-page and
output on HttpServletResponse.
This interface defines all methods which the WebClientServlet at least must provide
to be able to display the simulation statistics and there must be implemented to each Servlet...