Update train_max_run

Author: yangaws

tests/integ/test_tf_keras.py

@@ -33,7 +33,8 @@ def test_keras(sagemaker_session, tf_full_version):
                                role='SageMakerRole',
                                hyperparameters={'learning_rate': 1e-4, 'decay': 1e-6},
                                training_steps=500, evaluation_steps=5,
-                               train_instance_count=1, train_instance_type='ml.c4.xlarge')
+                               train_instance_count=1, train_instance_type='ml.c4.xlarge',
+                               train_max_run=45 * 60)
 
         inputs = estimator.sagemaker_session.upload_data(path=dataset_path, key_prefix='data/cifar10')