Fix ApplicationResourceIntegrationTest.testTriggerRedisStopEffector
Fix RedisStore.install on OS X
Fix BindDnsServerIntegrationTest.rebind
Fix GeoscalingIntegrationTest

- need to clear HostGeoInfo.cachedLookup, otherwise will keep
  using previous HostGeoLookup rather than StubHostGeoLookup
MongoDBServer: fix logging of consolePort != (port+1000)
Cassandra integration tests: better logging on port not available

- In setup+tearDown of each integration test, check that the standard 
  Cassandra ports are available. If they are not then wait for 
  4 mins (in case of TIMED-WAIT state), and then fail.
- This will show us which Cassandra test left the port open, if any.
Avoid NPE in BrooklynWebServer.stop
Add comment about RebindTestFixture checkSerializable
This closes #291