spark git commit: [SPARK-23132][PYTHON][ML] Run doctests in ml.image when testing

Repository: spark Updated Branches: refs/heads/branch-2.3 6e509fde3 -> b84c2a306 [SPARK-23132][PYTHON][ML] Run doctests in ml.image when testing ## What changes were proposed in this pull request? This PR proposes to actually run the doctests in `ml/image.py`. ## How was this patch tested?

spark git commit: [SPARK-23132][PYTHON][ML] Run doctests in ml.image when testing

Repository: spark Updated Branches: refs/heads/master 4e6f8fb15 -> 45ad97df8 [SPARK-23132][PYTHON][ML] Run doctests in ml.image when testing ## What changes were proposed in this pull request? This PR proposes to actually run the doctests in `ml/image.py`. ## How was this patch tested? doct