Get rid of inconsistency with neode setup

Created by: Tirokk

Authored by roschaefer Dec 3, 2019 Merged Dec 10, 2019

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Pullrequest

Implement getDriver() and getNeode() the same way

I want to introduce `neode` and `neo4j-graphql-js` to my students and
saw this.

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Fix cypress tests

Since `dotenv` in the backend now loads configuration from a file
relative to the current file, we don't have to duplicate the neo4j
configuration settings here.