Fix #53 metrics should be at stream level
Merge remote-tracking branch 'inmobi/develop' into timestamp-metrics
Add metrics to get timestamp of last processed file at service/stream level
Add test to check for last processed file timestamp metics
Move getDateFomCollectorFileName method to CalendarHelper util class
Resolve merge conflicts
Merge pull request #54 from AnnapurnaVemuri/timestamp-metrics

Fix #53 metrics should be at stream level