Definition step deprecated and affected tests modified.

For a table with action menus inside a scrollable region, we need to ensure
the table is at least big enough.

Merge branch 'MDL-58409-master_needs_clean_in_autocomplete_element' of https://github.com/dravek/moodle

This will allow the use of other storage systems implemented
in plugins.
It also allows for disabling the built in DB based profiling, which
will be useful when using an external target to not waste DB storage.

Support use of a token for access to pluginfile.php when rewriting text
content.

This is primarily intended for notifications where the user is unlikely
to be logged into Moodle when receiving the notification.