This includes:
- Changing PHPUnit's bootstrap to use https://www...
- Modify all existing expectations to the new wwwroot.
- Amend some tests now with different defaults because of is_https()
- Added a note to main upgrade.php about the change.
Units tests have been adjusted e.g. 'boost' instead of 'clean' in pix urls.
Some places I didn't update the test to reflect the boost markup and reset
the theme to clean. This is because the test was not testing the markup - but the
functionality (e.g. looking for specific structures to indicate an error in a form element).
Fixed bug by building full menu structure, then removing hidden menu items and all associated children.
Refactored custom_menu_item class and convert_text_to_menu_nodes() to improve maintenance.
Includes:
* constants refactoring
* reworked db table init
* support for $CFG->debug = -1
* functional DB tests
* fixed $DB->get_indexes() to not throw exceptions when table does not exist
* fix handling of user passwords in test db
* add debug info to exception messages
* removed unnecessary PHP debug errors from mathslib
* fixed @error suppression in get_string
* fixed PHPUnit error handler setup
* added timezone info to default install
