Reason for the change was that ha_notify_table_changed() was done
after table open when .frm had been replaced, which caused failure
in engines that checks on open if .frm matches the engines table
definition.
Other changes:
- Remove not needed open/close call at end of inline alter table.
Some test that depended on the table beeing in the table cache after
ALTER TABLE had to be updated.
007f68c37f