BUG#12400313

Hardening the test case:
  - including a diff_tables at the end.
  - increasing the tolerance on the relay limit size.

mysql-test/suite/rpl/r/rpl_stm_relay_ign_space.result

@@ -1,4 +1,5 @@
 include/master-slave.inc
 [connection master]
 include/assert.inc [Assert that relay log space is close to the limit]
+include/diff_tables.inc [master:test.t1,slave:test.t1]
 include/rpl_end.inc

mysql-test/suite/rpl/t/rpl_stm_relay_ign_space.test

@@ -82,12 +82,16 @@ INSERT INTO t1 VALUES ('xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 --let $relay_log_space_while_sql_is_executing = query_get_value(SHOW SLAVE STATUS, Relay_Log_Space, 1)
 --let $relay_log_space_limit = query_get_value(SHOW VARIABLES LIKE "relay_log_space_limit", Value, 1)
 --let $assert_text= Assert that relay log space is close to the limit
---let $assert_cond= $relay_log_space_while_sql_is_executing <= $relay_log_space_limit * 1.1
+--let $assert_cond= $relay_log_space_while_sql_is_executing <= $relay_log_space_limit * 1.15
 --source include/assert.inc
 
 # unlock the table and let SQL thread continue applying events
 UNLOCK TABLES;
 
+--connection master
+--let $diff_tables=master:test.t1,slave:test.t1
+--source include/diff_tables.inc
+
 --connection master
 DROP TABLE t1;
 --enable_query_log