perfschema.bad_option_1 fails in buildbot with timeout

perfschema.bad_option_1                  w1 [ fail ]  timeout after 900 seconds

        Test ended at 2017-09-21 07:30:35

Test case timeout after 900 seconds

== /usr/local/mariadb-10.2.9-linux-i686/mysql-test/var/1/log/bad_option_1.log == 

 == /usr/local/mariadb-10.2.9-linux-i686/mysql-test/var/1/tmp/analyze-timeout-mysqld.1.err ==

mysqltest: Could not open connection 'default' after 500 attempts: 2002 Can't connect to local MySQL server through socket '/usr/local/mariadb-10.2.9-linux-i686/mysql-test/var/tmp/1/mysqld' (111)

 - saving '/usr/local/mariadb-10.2.9-linux-i686/mysql-test/var/1/log/perfschema.bad_option_1/' to '/usr/local/mariadb-10.2.9-linux-i686/mysql-test/var/log/perfschema.bad_option_1/'

Retrying test perfschema.bad_option_1, attempt(2/3)...