Detect malformed database on manual building

[nichtich]

The following warning was generated from Python code in Jupyter notebook, unnoticed (it appears in the HTML output):

Received notification from DBMS server: {severity: WARNING} {code: Neo.ClientNotification.Statement.UnknownPropertyKeyWarning} {category: UNRECOGNIZED} {title: The provided property key is not in the database} {description: One of the property names in your query is not available in the database, make sure you didn't misspell it or that the label is available when you run this statement in your application (the missing property name is: P3_has_note)} {position: line: 1, column: 283, offset: 282} for query: 'MATCH (n:E16_Measurement)-[:P40_observed_dimension]->(m:E54_Dimension)-[:P2_has_type]->(:E55_Type)-[:P48_has_preferred_identifier]->(l) MATCH (m)-[:P91_has_unit]->(:E58_Measurement_Unit)-[:P48_has_preferred_identifier]->(o) RETURN m.P90_has_value AS value, o.P3_has_note AS unit, l.P3_has_note AS note;'

Better stop execution in this case. Reproducible with an empty neo4J database.