Fix GH-952: OGM returns empty result if query results contains nodes and rels with same native id

[nioertel]

Description

This PR fixes GH-952

All existing tests are green via Maven.

There is still one issue with the newly created test - when ran separately it works but when ran together with the other tests, it currently fails as it's quite hard to set up the required test data when not starting with a clean Neo4j. I will think of a solution for that. However I wanted to already create the PR so you can let me know what you think about the fix.

Types of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

CLA

Signed.

[nioertel]

The test for this issue/fix needs a clean Neo4j so that native ids for relationships and nodes start from 0 and are given consecutively without gaps within the test.
To work around this, I added a separate surefire execution to the integration-tests pom.xml so that this test gets its own JVM and own test container.

From my side the fix + test are ready - let me know what you think.

[michael-simons]

Oh man… Thanks for that, looks great. I'll merge away and probably polish afterwards.