LUTECE-2207: fix missing cause exception in sql failures in some cases

Author: jonenst

src/java/fr/paris/lutece/util/pool/service/ConnectionPool.java

@@ -130,7 +130,7 @@ private void initPool( int initConns )
             }
             catch( SQLException e )
             {
-                throw new AppException( "SQL Error executing command : " + e.toString( ) );
+                throw new AppException( "SQL Error executing command : " + e.toString( ), e );
             }
         }
     }
@@ -250,7 +250,7 @@ private boolean isConnectionOK( Connection conn )
                 }
                 catch( SQLException se )
                 {
-                    throw new AppException( "ConnectionService : SQL Error executing command : " + se.toString( ) );
+                    throw new AppException( "ConnectionService : SQL Error executing command : " + se.toString( ), se );
                 }
             }