audit_log_default_db failures

[Sergei Glushchenko]

There are two types of failures:

1. change_user does automatically reconnect in the 5.7 version of mysqltest

@@ -63,8 +63,6 @@
 "Query","<ID>","<DATETIME>","select","<CONN_ID>",0,"SELECT * FROM t","user1[user1] @ localhost []","localhost","","",""
 "Query","<ID>","<DATETIME>","change_db","<CONN_ID>",0,"use `db1`","user1[user1] @ localhost []","localhost","","","db1"
 "Change user","<ID>","<DATETIME>","<CONN_ID>",1044,"user2","user2","","","localhost","",""
-"Quit","<ID>","<DATETIME>","<CONN_ID>",0,"user1","user1","","","localhost","","db1"
-"Connect","<ID>","<DATETIME>","<CONN_ID>",0,"user1","user1","","","localhost","","db1"
 "Connect","<ID>","<DATETIME>","<CONN_ID>",0,"user1","user1","","","localhost","","db1"
 "Quit","<ID>","<DATETIME>","<CONN_ID>",0,"user1","user1","","","localhost","","db1"
 "Quit","<ID>","<DATETIME>","<CONN_ID>",0,"user1","user1","","","localhost","","db1"

2. warning appears after INSTALL PLUGIN (which is emitted upon UNINSTALL PLUGIN)

 "Query","<ID>","<DATETIME>","install_plugin","<CONN_ID>",0,"INSTALL PLUGIN audit_log SONAME 'audit_log.so'","root[root] @ localhost []","localhost","","",""
 "Quit","<ID>","<DATETIME>","<CONN_ID>",0,"root","root","","","localhost","","test"
+"Query","<ID>","<DATETIME>","show_warnings","<CONN_ID>",0,"SHOW WARNINGS","root[root] @ localhost []","localhost","","","test"
 "Query","<ID>","<DATETIME>","select","<CONN_ID>",0,"SELECT * FROM t","user1[user1] @ localhost []","localhost","","",""
 "Query","<ID>","<DATETIME>","change_db","<CONN_ID>",0,"use `db1`","user1[user1] @ localhost []","localhost","","","db1"
 "Change user","<ID>","<DATETIME>","<CONN_ID>",1044,"user2","user2","","","localhost","",""

[Sergei Glushchenko (sergei.glushchenko)]

https://github.com/percona/percona-server/pull/941

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PS-1736