excersise2 with all columns

Signed-off-by: Anosh Rezaei <ahmadanosh.ar@gmail.com>

Author: anosh-ar

exercises/exercise2.jv

@@ -21,7 +21,7 @@ pipeline treesPipeline {
      treesTextFileInterpreter
         -> treesCSVInterpreter 
         //-> NameHeaderWriter
-        -> DBAColumnDeleter
+        //-> DBAColumnDeleter
         -> treesTableInterpreter
         -> treesLoader;