unoidl-check: Also check for invalid UNOIDL identifiers
unoidl-check: Also check for invalid UNOIDL identifiers

...but only in those parts of registry B that are not also in registry A.  That
way, we can detect newly introduced violations while ignoring the old
(published) violations for backwards compatibility.

Change-Id: Ifb8ea98fffca29647aa6677a5ade86e5b194ddee

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core