Refining the tests since pb revealed the older version's fragality - the error from SF() due to killed
may be different on different env:s.
DBUG_ASSERT instead of assert.


mysql-test/r/binlog_killed.result:
  new result file
mysql-test/t/binlog_killed.test:
  regression for bug#22725 simplified. tests for bug27563, BUG#27565 made inactive.
sql/sql_insert.cc:
  DBUG_ASSERT