post merge fixes (from merging test fixes from bug 19914)

mysql-test/r/ndb_multi.result:
  update result file with post-merge results
sql/ha_ndbcluster.cc:
  update usage of ndb_get_table_statistics for changes made for bug 19914

mysql-test/r/ndb_multi.result

@@ -35,6 +35,10 @@ a
 select * from t1;
 a
 2
+flush status;
+select * from t1;
+a
+2
 update t1 set a=3 where a=2;
 show status like 'handler_discover%';
 Variable_name	Value