fix: update AutoML default max_candidate value to use the service default (#1491)

Author: chuyang-deng

src/sagemaker/automl/automl.py

@@ -39,7 +39,7 @@ def __init__(
         encrypt_inter_container_traffic=False,
         vpc_config=None,
         problem_type=None,
-        max_candidates=500,
+        max_candidates=None,
         max_runtime_per_training_job_in_seconds=None,
         total_job_runtime_in_seconds=None,
         job_objective=None,

tests/unit/sagemaker/automl/test_auto_ml.py

@@ -32,7 +32,7 @@
 DEFAULT_S3_INPUT_DATA = "s3://{}/data".format(BUCKET_NAME)
 DEFAULT_OUTPUT_PATH = "s3://{}/".format(BUCKET_NAME)
 LOCAL_DATA_PATH = "file://data"
-DEFAULT_MAX_CANDIDATES = 500
+DEFAULT_MAX_CANDIDATES = None
 DEFAULT_JOB_NAME = "automl-{}".format(TIMESTAMP)
 
 JOB_NAME = "default-job-name"