Fix SshCommandIntegrationTest

- Change sensor period to 100ms, from default 5 mins.
  Otherwise if first poll happens before serviceUp=true, it will
  timeout in 30 seconds without a second poll.
Fix HttpRequestSensorTest.testHttpSensor

- Change sensor period to 100ms, from default 5 mins.
  Otherwise if first poll happens before serviceUp=true, it will
  timeout in 30 seconds without a second poll.