The tests can now wait for a number of monitor intervals. This removes the
need to have hard-coded sleeps in the code and makes monitor tests more
robust under heavier load.
Increased the amount of time that the tests sleep while they wait for
states to change. This should make them more tolerant of server load by
allowing more time for things to settle down.
- The test starts with the usual setup of 1 master and 3 slaves.
- Then the master is taken down and it is checked that the failover
mechanism promotes some slave to master.
- This is continued until there is a single master left (no
slaves).
