BUG#39934 - post-push fixes.

The rpl_ndb/combinations file was introduced as part of the fix.
The file contained an error: ndb suites shall not run with
binlog_format=mixed. Removed that combination.

mysql-test/suite/rpl_ndb/combinations

 [row]
 binlog-format=row
 
-[stmt]
-binlog-format=statement
-
 [mix]
 binlog-format=mixed

mysql-test/suite/rpl_ndb/t/rpl_ndb_mixed_tables.test

@@ -45,6 +45,7 @@
 --source include/have_ndb.inc
 --source include/have_innodb.inc
 --source include/ndb_master-slave.inc
+--source include/have_binlog_format_mixed_or_row.inc
 
 --echo ---- setup master ----