Revert "Fix brittle test, code from jaysee00/jHipChat."

This reverts commit 20e08e197e5127814f2943381211f37d017d2c24.
Fix brittle test, code from jaysee00/jHipChat.

When testing creation and deletion of rooms, there is a delay in
deleting a room and the room being reported as deleted in the next call
to `listRooms()`.