Increase the scope of the files that are detected and
indexed by Moodle's Global Search. This includes intro
and content areas of search areas. The use case here is
in a description for an activity there is a file added
that contains more information about the activity.
It would an advantage to be able to search this content
as well. It would also allow search engine plugins to be
able to index non text files such as images.
It was decided to roll only configuration dates and any date related to user content
such as 'timecreated' , 'timemodified' etc should not be rolled forward.
Fixes bug where the resource module loads metadata for all files while
building course modinfo, even though it only needs the first file.
(This causes problems if you have ~10k files.)
If file details (size, type, date) are configured to be displayed we cache them
in course cache raw and build the display string in user language/timezone when
displaying. Also changed behat test not to fail in 2016
Matt Porritt