FIX form type convertion on generated files

Related to issue https://github.com/avocode/FormExtensions/issues/84 `type` option in addFormOptions was no longer taked into account because form name has changed (and so, previously test on the keyword `collection` was failing).

IMO, this test was not necessary. So I removed it and add constraint that string must end by `Type` in order to be converted as a real object instanciation.