As suggested, drilling down into the test case, TestManyToOne.java and running/debuging readWriteBasic(NoSqlEntityManager)
I get 1 error.
readWriteBasic – (Method not found)
and
Unrooted Tests
initializationError
My concern here is that i do not get the option to step into.

You ran into an annoying eclipse bug. Try this
If #1 fails, then right click the project, choose refresh, then click Project -> Clean… and then try all 3 steps again.