mattrussi and brian-brazil Update the Apache Cassandra example configuration (#330)
* Update the Apache Cassandra example configuration

Inspired by the kafka-2_0_0.yml configuration
* Latency histograms are exported as emulated Summaries.
* Otherwise, histograms exported as Summaries without the _sum.

Signed-off-by: Matt Russi <mattrussi@users.noreply.github.com>
Latest commit 4398d7c Nov 15, 2018