Fixed auto_increment_dup test. Current behavior is correct for repeatable read (and
serializable) isolation levels. Old behavior is correct for read committed
isolation level.
* support statically compiled file_key_management when possible
* rename encryption.encryption_create_or_replace -> encryption.create_or_replace
* delete unnecessary *.opt file (including
have_key_management_plugin.inc is enough)
* remove unnecessary LOWER() for strings that are compared
case insensitively anyway