- Information_schema.innodb_tablespaces_encryption should print
undo tablespace name as innodb_undo001, innodb_undo002 and soon.
- Encryption test should include undo tablespaces count when
the tests are waiting for the condition to check whether all
tables are encrypted or decrypted.
Historically, InnoDB split the redo log into at least 2 files.
MDEV-12061 allowed the minimum to be innodb_log_files_in_group=1,
but it kept the default at innodb_log_files_in_group=2.
Because performance seems to be slightly better with only one log file,
and because implementing an append-only variant of the log would require
a single file, let us define the default to be 1, and have
innodb_log_file_size=96M, to retain the same default total size.
dict_create_or_check_foreign_constraint_tables(): Change the warning
about the foreign key metadata table creation to a note.
Remove messages after metadata table creation. If the creation fails,
startup will abort with a message. Normally the creation succeeds on
bootstrap, and the messages would only be noise.
Remove the related suppressions from the tests.
