Create pipeline for importing test data to db. Over write and add alongside options. OS independent

[DouglasUT2018]

[DouglasUT2018]

https://neo4j.com/developer/kb/export-sub-graph-to-cypher-and-import/

[ijmccallum]

I have found a way to share db files with the dockerized instance of neo4j.
TODO: create a repo for test / demo / dev data & write up instructions on the docs site.