[EAGLE-872] Transform counter metric to rate metric

- Add transform bolt using counterToRateFunction in HadoopMetricMonitorApp's storm topology.

https://issues.apache.org/jira/browse/EAGLE-872

Author: r7raul1984 <tangjijun@yhd.com>

Closes #783 from r7raul1984/EAGLE-872.
11 files changed