refs codership/galera#308

- Moves call wsrep_free_status() to THD::cleanup_after_query().
  Wsrep status variables were previously freed only on SHOW STATUS.
- Removes valgrind suppression from mysql-test/valgrind.

mysql-test/valgrind.supp

@@ -1283,28 +1283,6 @@
   fun:dlopen@@GLIBC_2.2.5
 }
 
-{
-   GitHub codership/galera#308
-   Memcheck:Leak
-   match-leak-kinds: definite
-   fun:malloc
-   fun:_ZNK6galera13ReplicatorSMM9stats_getEv
-   fun:_ZL28export_wsrep_status_to_mysqlP3THD
-   fun:_Z17wsrep_show_statusP3THDP17st_mysql_show_varPc
-   fun:_ZL17show_status_arrayP3THDPKcP17st_mysql_show_var13enum_var_typeP17system_status_varS2_P5TABLEbP4Item
-   fun:_Z11fill_statusP3THDP10TABLE_LISTP4Item
-   fun:_ZL13do_fill_tableP3THDP10TABLE_LISTP13st_join_table
-   fun:_Z24get_schema_tables_resultP4JOIN23enum_schema_table_state
-   fun:_ZN4JOIN14prepare_resultEPP4ListI4ItemE
-   fun:_ZN4JOIN4execEv
-   fun:_ZL20mysql_execute_selectP3THDP13st_select_lexb
-   fun:_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_P10SQL_I_ListI8st_orderESB_S7_yP13select_resultP18st_select_lex_unitP13st_select_lex
-   fun:_Z13handle_selectP3THDP13select_resultm
-   fun:_ZL21execute_sqlcom_selectP3THDP10TABLE_LIST
-   fun:_Z21mysql_execute_commandP3THD
-   fun:_Z11mysql_parseP3THDPcjP12Parser_state
-}
-
 {
    GitHub codership/mysql-wsrep#176
    Memcheck:Leak

sql/sql_class.cc

@@ -2361,6 +2361,10 @@ void THD::cleanup_after_query()
     rgi_slave->cleanup_after_query();
 #endif
 
+#ifdef WITH_WSREP
+  wsrep_free_status(this);
+#endif /* WITH_WSREP */
+
   DBUG_VOID_RETURN;
 }
 

sql/sql_parse.cc

@@ -2774,9 +2774,6 @@ mysql_execute_command(THD *thd)
   case SQLCOM_SHOW_STATUS:
   {
     execute_show_status(thd, all_tables);
-#ifdef WITH_WSREP
-    wsrep_free_status(thd);
-#endif /* WITH_WSREP */
     break;
   }
   case SQLCOM_SHOW_EXPLAIN: