Log messages from shell-scripts were put to var/log/<test id>.log
file. Now, this file is used by mysql-test-run.pl. So, move log
messages to var/log/<test id>.script.log.
fails randomly.
The problem was that the test case used command line tool (mysql)
without specifying connect_timeout argument. In some cases,
this lead to hanging of the test case.
The fix is to specify --connect_timeout=1 when starting mysql.
Also, the patch contains polishing and various cleanups to simplify
analyzing of the problems further.
The patch affects only test suite, no server codebase has been
touched.
