Reduce influxdb schema to only the values we currently plan to use.
We'll re-add new params as they are needed and as we understand influxdb
scalability better.

Docker-DCO-1.1-Signed-off-by: Rohit Jnagal <jnagal@google.com> (github: rjnagal)
Merge pull request #172 from rjnagal/influxdb

Reduce influxdb schema to only the values we currently plan to use.