Investigate why two predictor tests fail with "Unknown command: 'train'" on x86

[tannergooding]

There are currently two TestPredictors tests disabled on x86 due to: [ConditionalFact(typeof(Environment), nameof(Environment.Is64BitProcess))] // x86 fails with "Unknown command: 'train'; Format error at (83,3)-(83,4011): Illegal quoting".

This issue needs further investigation.

[artidoro]

@tannergooding are you looking into this?