Handling of write sets, which fail in certification happens differently than
with write sets which pass certification. When certification fails, the
write set applying can be skipped and applier needs only to take care of
wsrep XID checkpointing. With current implementation, this can rush ahead
of wsrep XID checkpointing of successful write sets.

The fix in this PR registers wsrep XID checkpointing of certification failure cases in group commit,
which guarantees that XID ceckpointing order is synchronized with real committing transactions.
Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>