fixes rpl_expose_password-bug20712046 (test case)

fixes rpl_mts_slave_preserve_commit_order_deadlock_error (log_event.cc)
fixes processlist_priv_no_prot (rpl_rli.cc)
fixes rpl_row_ignorable_event (rpl_rli.cc)

Clean-up for Bug#20712046 which was
Approved by: Karthik Kamath <[email protected]>

Author: Tatiana Azundris Nuernberg

sql/log_event.cc

@@ -4737,6 +4737,7 @@ int Query_log_event::do_apply_event(Relay_log_info const *rli,
     thd->set_time(&when);
     thd->set_query_and_id((char*)query_arg, q_len_arg,
                           thd->charset(), next_query_id());
+    thd->set_query_for_display(query_arg, q_len_arg);
     thd->variables.pseudo_thread_id= thread_id;		// for temp tables
     attach_temp_tables_worker(thd);
     DBUG_PRINT("query",("%s", thd->query()));

sql/rpl_rli.cc

@@ -1,4 +1,4 @@
-/* Copyright (c) 2006, 2018, Oracle and/or its affiliates. All rights reserved.
+/* Copyright (c) 2006, 2019, Oracle and/or its affiliates. All rights reserved.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -1539,6 +1539,7 @@ void Relay_log_info::cleanup_context(THD *thd, bool error)
   }
   if (rows_query_ev)
   {
+    info_thd->reset_query_for_display();
     delete rows_query_ev;
     rows_query_ev= NULL;
     info_thd->set_query(NULL, 0);