Crash in Neo4jPersistenceProvider#FetchDatabaseInfo

[robotgryphon]

I'm not sure what exactly the reproduction steps are; it looks like the Neo4j persistence manager blows up trying to read an empty collection (LINQ First instead of handling a null w/ FirstOrDefault)

Relevant code: https://gist.github.com/robotgryphon/a8c9a873b8aba5eac917a4198424724d

Database set up:

• Running on Enterprise 5.23.0 (Neo4j Desktop, Linux)
• Created a webadmin user for management
  • Roles: architect, editor, publisher, reader, PUBLIC
• First run of this program code DID work to make an initial set of labels, but never again