Add exists() and waitForX() to cdap-client classes
CDAP-469 Endpoint to list all services
Addressing comments
Addressing comments
initial check in for guage support
Merge branch 'develop' of github.com:caskdata/cdap into feature/metrics-guage-support
 removing explicit  Metrics content type {count,gauge} instead, we will allow user to call gauge or increment the metric value based on the use-case
reomove unwanted formatting changes
refactor set to gauge
 test case for gauge
Merge develop
Fix checkstyle
remving irrlevant comments
Addressed comments
adding enum metrics type for count and type and recording them in Metrics Record and changing behavior in collection service
adding gauge for user metrics
removed a todo
doc and format fixes
updating metric name to be relevant
cast to long in mapreduce metrics emitter instead of int