1. Slice of fix for Bug#42003 tests missing the disconnect of connections <> default

- If missing: add "disconnect <session>"
   - If physical disconnect of non "default" sessions is not finished
     at test end: add routine which waits till this happened
+ additional improvements like
  - remove superfluous files created by the test
  - replace error numbers by error names
  - remove trailing spaces, replace tabs by spaces
  - unify writing of bugs within comments
  - correct comments
  - minor changes of formatting
Modifications according to the code review are included.
Fixed tests:
grant2
grant3
lock_tables_lost_commit
mysqldump
openssl_1
outfile

mysql-test/t/lock_tables_lost_commit.test

@@ -1,24 +1,33 @@
-# This is a test for bug 578
+# Test for Bug#578 mysqlimport -l silently fails when binlog-ignore-db is set
 
--- source include/have_innodb.inc
+--source include/have_innodb.inc
+
+# Save the initial number of concurrent sessions
+--source include/count_sessions.inc
 
 connect (con1,localhost,root,,);
 connect (con2,localhost,root,,);
 
 connection con1;
 --disable_warnings
-drop table if exists t1;
-create table t1(a int) engine=innodb;
+DROP TABLE IF EXISTS t1;
+CREATE TABLE t1(a INT) ENGINE=innodb;
 --enable_warnings
-lock tables t1 write;
-insert into t1 values(10);
+LOCK TABLES t1 WRITE;
+INSERT INTO t1 VALUES(10);
 disconnect con1;
 
 connection con2;
 # The bug was that, because of the LOCK TABLES, the handler "forgot" to commit,
 # and the other commit when we write to the binlog was not done because of
-# binlog-ignore-db  
-select * from t1;
-drop table t1;
+# binlog-ignore-db
+SELECT * FROM t1;
+DROP TABLE t1;
+
+connection default;
+disconnect con2;
 
 # End of 4.1 tests
+
+# Wait till we reached the initial number of concurrent sessions
+--source include/wait_until_count_sessions.inc