Author: Andrew Madden
MDL-73073 mod_assign: Add new time limit fields to external functions
* Add activity, activityformat, timelimit and submissionattachments to mod_assign_get_assignments
* Add timestarted to mod_assign_get_submissions and mod_assign_get_submission_status
* Add assignmentdata to mod_assign_get_submission_status
* Move mod_assign external helper methods to an external_api child class to be used with modern external classes
* Add start_submission external function
* Create mod_assign child class of externallib_advanced_testcase for shared helper functions
* Add extra logic to get_assignments on whether to provide intro
attachments.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4ae22703c69d011465cb81fa16343d69eca3fa24
http://github.com/moodle/moodle/commit/4ae22703c69d011465cb81fa16343d69eca3fa24
+ 4.0 en [opensubmissionexists,mod_assign]
+ 4.0 en [submissionnotopen,mod_assign]
+ 4.0 en [timelimitnotenabled,mod_assign]