Network fix

git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi/V_4.x/Server/trunk@20139 99afaf0d-6903-0410-885a-c66a8bbb5f81
Put the getDataSource in a try catch statement. For the engines that does not use the data source

git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi/V_4.x/Server/trunk@20140 99afaf0d-6903-0410-885a-c66a8bbb5f81