Improved exception handling in the case something goes wrong in load layer service

git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi/V_4.x/Server/trunk@20926 99afaf0d-6903-0410-885a-c66a8bbb5f81


git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi/V_4.x/Server/trunk@20927 99afaf0d-6903-0410-885a-c66a8bbb5f81