Fixed flaky test for EventLog

there are multiple events logged at the same time
hence the order in which events are retreived is
not predictable.
Merge pull request #234 from alphagov/fix-flaky-test

Fixed flaky test for EventLog
Event log to track suspended account login attempt

https://www.agileplannerapp.com/boards/173808/cards/3443

this should help the admin understand why a user
login was prevented even though correct login
credentials were supplied.