changed MetricsTable put(API) to use long instead of byte array
Merge branch 'develop' of github.com:caskdata/cdap into feature/MetricsTable_PutAPI_useLong

Conflicts:
	cdap-watchdog/src/main/java/co/cask/cdap/metrics/data/AggregatesTable.java
 Using Generics for Map Transformation and Bytes.immutableSortedMap
copyright fix
update based on code review
code review changes
removed unused code
removed unused imports
style fixes
Merge pull request #577 from caskdata/feature/MetricsTable_PutAPI_useLong

CDAP 544 - MetricsTable API Put to use Long instead of byte array