Added getEngineByDriver method 

git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi/V_4.x/Server/trunk@21949 99afaf0d-6903-0410-885a-c66a8bbb5f81
Managed create document actions in agreement with the presence of the engines

git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi/V_4.x/Server/trunk@21950 99afaf0d-6903-0410-885a-c66a8bbb5f81
Managed create document actions in agreement with the presence of the engines

git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi/V_4.x/Server/trunk@21951 99afaf0d-6903-0410-885a-c66a8bbb5f81