delete_course_modules can fail when it can't connect to Mahara. #106
Description
when deleting an activity, if the curl call fails it will trigger an exception which prevents the activity from being deleted - which then can cause all sorts of other bad behaviour. We need to ignore exceptions and allow the deletion to continue.
eg:
Adhoc task failed: core_course\task\course_delete_modules,Coding error detected, it must be fixed by a programmer: The following course modules could not be deleted:
The course module 1132134 could not be deleted.
Attempt to send Mahara request resulted in error: error/webservice call was not successful: /mod/assign/submission/maharaws/locallib.php(654)
#0 /mod/assign/submission/maharaws/locallib.php(1193): assign_submission_maharaws->release_submitted_view()
#1 /mod/assign/locallib.php(875): assign_submission_maharaws->delete_instance()