HONEYCOMB-288: JMH's CSV postprocessing to format accepted by Jenkin's plot plugin

HONEYCOMB-288: JMH's CSV postprocessing to format accepted by Jenkin's plot plugin

Generates 3 plots for write operations:
- simple-container.csv,
- list-in-container.csv,
- complex-list-in-container.csv

and one plot for read operations: operational-read.csv

from benchmark.csv.

Jenkins plot plugin uses only first record line from CSV file:
https://github.com/jenkinsci/plot-plugin/blob/master/src/main/webapp/help-csv.html#L15

therefore each generated CSV contains two lines: header and single record.

Change-Id: I489c3401673d72a4b3ea3ec00197366118d1ff5f
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>