GS-11437
Added gs-openspaces-jetty.jar explicitly to web app class loader.
Add method to Locator class to provide location of gs-openspaces-jetty.jar.

git-svn-id: svn://pc-lab14/SVN/xap/trunk/openspaces@175384 eb64e737-3616-4df0-8941-5ee2ae88103d