BUG-14031 Add ProcessMaker fields attribute identifier in generated HTML

Some fields doesn't have pm:fieldtype attribute. Class xmlform modified, it has been added NSFieldType function for render fields.
Merge pull request #2284 from norahmollo/BUG-14031

BUG-14031 Add ProcessMaker fields attribute identifier in generated HTML
Merge pull request #2285 from norahmollo/BUG-14140

BUG-14140 Al pasar el formulario con "Next Step" nos muestra el mensaje ...
Fix incorrect object declaration, PHP 5.4.x compatibility
Merge pull request #2286 from julceslauhub/master

Fix incorrect object declaration, PHP 5.4.x compatibility
BUG-14140 Al pasar el formulario con "Next Step" nos muestra el mensaje Do you want to save changes?

Al pasar al siguiente paso con la opcion "Next Step" no debe mostrar el mesnaje de Do you want to save changes? cuando no se hicieron cambios.