All the setup/teardown/pre/post/conditions template methods
now are required to return void. This was warned with phpunit 7
and now is enforced.
At the same time, fix a few wrong function names,
provider data and param types, return statements...
When some activities are manually completed by students, some are still showing in students' timeline.
This commit fix that for module assign,chat,choice,feedback,lesson,quiz,scorm and workshop.
Previously the test was assuming that the user last ping, when
accessing to a chat should match the first (enter) system message
sent to the chat. And that's ok 99% of times but, if seconds advance
between the creation of the chat_users record and the chat_messages
one, then they don't match.
So now, the assumption is not used anymore and the expectation
is the timestamp of that first (enter) system message, explicitly.
Eloy Lafuente (stronk7)