Feature/metrics-timeresolution-support

Test cases for having Time series table with resolution for a minute and bug fixes to support that.

Time series table previously just writes the new data as we only tested resolution with a second, with minute aggregation , we would want to add to the previous timestamp if an entry exists and the metric type is counter, so added increment support in the time series table.

https://issues.cask.co/browse/CDAP-625
It is fine to do increment. It is fine to do increment per resolution. We will use readless increments. We will optimize rolling up from higher res to lower res.

Here's the Q, however: can we do increments in batch, not one-by-one? I think we don't use write buffer for hbase tables. Let's just increment in batch