1. Fixed the OverViewLayerQuery#getTopNSlowService method bug which is not order by average response time. (#913)

2. Fixed the OverViewLayerQuery#getTopNApplicationThroughput method bug which is not order by TPS.
3. Fixed the ApplicationQuery#getSlowService method bug which is not order by average response time.
4. Fixed the ApplicationQuery#getServerThroughput method bug which is not order by TPS.

#907