Assign CA role instead of LA to 16 authors of AR4 WGII Ch8

The 16 CA authors of AR4 WGII Chapter 8 were wrongly given
the role LA in the database. As a result, no CA authors were
present in this chapter.
Reorder CA and LA authors in same order as source document

The order is mostly by role then last name and first name,
with some errors in alphabetical order (preserved).