This removes a number of timing related things, leaving just the total
test timeout now bumped to one minute. Normally we get the filesystem
events within a second or so, so this doesn't affect the test time in
the successfull case. If we don't actually get the events we expect
within a minute I think we are legitimately in "failed" territory.
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4715
LGTM: imsodin, AudriusButkevicius
