Fixing locale name: en_US.UTF-8 -> en_US.utf8

Don't do character set autodetection when running
mysql from mysql_fix_privilege_tables.

Fixed problems:
- "mtr --mem mysql_locale_posix" could fail because of wrong temporary
  directory name: var/tmp/ -> $MYSQLTEST_VARDIR/tmp/
- "mtr federated_debug" could fail because of not compiled-in
   locale character set.  Always run mysqladmin with latin1.

instead of making it experimental.

Remove the extra line which try to use the name INNOBASE again. The IF ELSE
loop above declares the library name based on the version of mysql

push_warning(MYSQL_ERROR::WARN_LEVEL_ERROR)).

The Signal/Resignal patch changes the push_warning() API: now
it silently downgrades WARN_LEVEL_ERROR to WARN_LEVEL_WARN.

This patch should be rolled back when Bug#47233 is fixed.

Knowledge of no SSL support is not used
Skip tests the same way e.g. innodb tests are
Does not refer to have_ssl_communication.inc, 
     will add this when merging to 6.0-codebase

- Renaming sr_YU to sr_RS
- Adding test case