Changes

• Replace all occurences of tf.contrib.estimator.BaselineEstimator with tf.estimator.BaselineEstimator
• Replace all occurences of tf.contrib.estimator.DNNLinearCombinedEstimator with tf.estimator.DNNLinearCombinedEstimator
• Replace all occurrences of tf.contrib.estimator.DNNEstimator with tf.estimator.DNNEstimator
• Replace all occurrences of tf.contrib.estimator.LinearEstimator with tf.estimator.LinearEstimator
• Users of tf.contrib.estimator.export_all_saved_models and related should switch to tf.estimator.Estimator.experimental_export_all_saved_models.
• Update regression_head to head API for Canned Estimator V2.
• Update multi_class_head to head API for Canned Estimator V2.
• Replace all occurences of tf.contrib.estimator.InMemoryEvaluatorHook and tf.contrib.estimator.make_stop_at_checkpoint_step_hook with tf.estimator.experimental.InMemoryEvaluatorHook and tf.estimator.experimental.make_stop_at_checkpoint_step_hook
• Migrate linear optimizer from contrib to core.

Thanks to our Contributors

This release contains contributions from many people at Google.