encryption.innodb-encryption-alter fails in buildbot with lock wait timeout

encryption.innodb-encryption-alter 'ctr,innodb' w1 [ fail ]

        Test ended at 2017-08-04 07:18:10

CURRENT_TEST: encryption.innodb-encryption-alter

--- /usr/share/mysql/mysql-test/suite/encryption/r/innodb-encryption-alter.result	2017-08-04 05:38:11.000000000 -0400

+++ /dev/shm/var/1/log/innodb-encryption-alter.reject	2017-08-04 07:18:09.942865759 -0400

@@ -48,4 +48,5 @@

 Error	1005	Can't create table `test`.`#sql-temporary` (errno: 140 "Wrong create options")

 Warning	1030	Got error 140 "Wrong create options" from storage engine InnoDB

 set innodb_default_encryption_key_id = 1;

+ERROR HY000: Lock wait timeout exceeded; try restarting transaction

 drop table t1,t2;

mysqltest: Result length mismatch