Bug #43418 MTR2: does not notice a memory leak occuring at shutdown of mysqld w/ --valgrind

Checking is done before server is terminated
Adds post processing of server logs if --valgrind
Also had to remove --quiet option to valgrind

mysql-test/include/mtr_warnings.sql

@@ -175,6 +175,14 @@ INSERT INTO global_suppressions VALUES
  ("Can't find file: '.\\\\test\\\\\\?{8}.frm'"),
  ("Slave: Unknown table 't1' Error_code: 1051"),
 
+ /* Messages from valgrind */
+ ("==[0-9]*== Memcheck,"),
+ ("==[0-9]*== Copyright"),
+ ("==[0-9]*== Using"),
+ ("==[0-9]*== For more details"),
+ /* This comes with innodb plugin tests */
+ ("==[0-9]*== Warning: set address range perms: large range .* .defined."),
+
  ("THE_LAST_SUPPRESSION")||