Grammar fields names issues

[Bernardo-MG]

There is a problem with grammar fields where sometimes it gives the base field name instead of the one of the current field.

For example, after creating a numeric field, and naming it 'Field 1', it's name may still be 'Numeric Field'. This seems to be a problem related with fields being a combination of optional rules.

The easiest way to solve this is to add a 'name' parameter to the field creation methods.

[Bernardo-MG]

The factory now makes sure the name is correctly set.