modified:
  storage/connect/ha_connect.cc
  storage/connect/mysql-test/connect/r/xml.result

- Testing default pivot columns for srcdef
  Fixing order by MariaDB bug for pivot tables
modified:
  storage/connect/tabmysql.cpp
  storage/connect/tabmysql.h
  storage/connect/tabpivot.cpp
  storage/connect/tabpivot.h