innodb.innodb-alter-table fails in buildbot with timeout

rpl.rpl_row_drop_create_temp_table 'innodb_plugin,row' w2 [ fail ]  timeout after 900 seconds

        Test ended at 2016-08-14 11:12:05

Test case timeout after 900 seconds

== /var/lib/buildbot/maria-slave/p8-trusty-bintar/build/mysql-test/var/2/log/rpl_row_drop_create_temp_table.log == 

#

#3) Generates in the binlog what follows:

#

SET @commands= 'B T Drop-Temp-T-Temp R';

BEGIN;

INSERT INTO tt_xx_1() VALUES (1);

DROP TEMPORARY TABLE tt_tmp_2;

ROLLBACK;

-b-b-b-b-b-b-b-b-b-b-b- >> B T Drop-Temp-T-Temp R << -b-b-b-b-b-b-b-b-b-b-b-

include/show_binlog_events.inc

Log_name	Pos	Event_type	Server_id	End_log_pos	Info

master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#

master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)

master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F

master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_tmp_2` /* generated by server */

master-bin.000001	#	Query	#	#	ROLLBACK

-e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-T-Temp R << -e-e-e-e-e-e-e-e-e-e-e-