Another change needed in the LwDITA grammar files

@outputclass is not available on <prolog> and <topicmeta>. I think is a place where LwDITA is still aligned with DITA 1.3. Let’s fix this.

Best,
Kris

Kristen James Eberlein  Chair, OASIS DITA Technical Committee  Owner, Eberlein Consulting LLC  
Skype: kriseberlein; voice: +1 (919) 622-1501