Post-merge fixes.


mysql-test/r/rpl_row_tabledefs_3innodb.result:
  Result change
mysql-test/t/disabled.def:
  Disabling test that appear to be fixed in other clones
sql/field.cc:
  Post-merge fix
sql/log_event.cc:
  Changes to unpack_row():
  - Documentation
  - New parameter, the write/read set
  - R/W set now 0-indexed instead of 1-indexed
  - Removed column value printing
  Changes to replace_record():
  - Documentation
  - Removed column value printing
  Removed unused function print_column_values()