Treat the waitTime passed into `flush` as a timeout rather than a time-between-loops, so that we can pass in bigger times and not slow the tests down too much. Bump the timeout when waiting for /publicRooms and /initialSync in the joining test.
Treat the waitTime passed into `flush` as a timeout rather than a time-between-loops, so that we can pass in bigger times and not slow the tests down too much. Bump the timeout when waiting for /publicRooms and /initialSync in the joining test.