Test percona_log_slow_query_plan is unstable

[Laurynas Biveinis]

On 5.5 trunk:

main.percona_log_slow_query_plan w4 [ fail ]
        Test ended at 2016-08-26 12:57:59

CURRENT_TEST: main.percona_log_slow_query_plan
--- /mnt/workspace/percona-server-5.5-trunk/BUILD_TYPE/release/Host/ubuntu-xenial-64bit/mysql-test/r/percona_log_slow_query_plan.result 2016-08-26 19:41:53.442540777 +0300
+++ /mnt/workspace/percona-server-5.5-trunk/BUILD_TYPE/release/Host/ubuntu-xenial-64bit/mysql-test/r/percona_log_slow_query_plan.reject 2016-08-26 19:57:58.925381443 +0300
@@ -17,7 +17,7 @@
 2 5
 [log_stop.inc] percona_slow_query_log.query_plan_0
 [log_grep.inc] file: percona_slow_query_log.query_plan_0 pattern: ^# Filesort: No Filesort_on_disk: No Merge_passes: 0$
-[log_grep.inc] lines: 2
+[log_grep.inc] lines: 0
 EXPLAIN SELECT * FROM t1 ORDER BY b;
 id select_type table type possible_keys key key_len ref rows Extra
 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using filesort

mysqltest: Result content mismatch

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PS-3535