Allow WSRP configuration files to be picked up from gatein.conf.dir

The Web Services for Remote Portlet (WSRP) configuration files for consumers and producer were previously only looked for in the WSRP extension archive. This resulted in extra configuration complexity for customers who wanted to edit the configuration directives for WSRP consumers and producer. The fix implements changes to the WSRP integration point that will now also look for WSRP configuration files in the conf/gatein directory of the active JBoss AS profile.