Add changes to db/schema.rb for vat_class relations.
Add changes to db/schema.rb for vat_class relations.

huerlisi/bookyt,wtag/bookyt,hauledev/bookyt,gaapt/bookyt,wtag/bookyt,wtag/bookyt,xuewenfei/bookyt,xuewenfei/bookyt,xuewenfei/bookyt,huerlisi/bookyt,silvermind/bookyt,gaapt/bookyt,silvermind/bookyt,hauledev/bookyt,gaapt/bookyt,hauledev/bookyt,silvermind/bookyt,gaapt/bookyt,silvermind/bookyt,hauledev/bookyt,huerlisi/bookyt