Bug #24688694 SEVERAL UNSTABLE TESTS IN SUITE PERFSCHEMA

Disabled perfschema.idx_metadata_locks which is failing very frequently.

Reviewed by : [email protected]

Author: agopi

mysql-test/suite/perfschema/t/disabled.def

@@ -15,3 +15,4 @@ perfschema.idx_events_waits_current         : Bug#24688694 2016-09-19 Marc Frequ
 perfschema.stage_mdl_function               : Bug#24688694 2016-09-19 Marc Frequent failures on PB2
 perfschema.innodb_is_data_locks             : Bug#24688694 2016-09-19 Marc Frequent failures on PB2
 perfschema.stage_mdl_table                  : Bug#24688694 2017-01-06 Erlend Frequent failures on PB2
+perfschema.idx_metadata_locks               : Bug#24688694 2017-02-10 Anitha Frequent failures on PB2