fixes for model builder #383

Job	Run time
collab-check	5s
wait-for-approval	3s
detect-changes	11s
integ-tests (sagemaker-train)	1h 16m 9s
integ-tests (sagemaker-mlops)	11m 17s
integ-tests (sagemaker-serve)	35m 40s
integ-tests (sagemaker-core)	22m 49s
codestyle-doc-tests (sagemaker-mlops)	6m 59s
unit-tests (sagemaker-mlops)	31m 9s
unit-tests (sagemaker-core)	1h 2m 3s
codestyle-doc-tests (sagemaker-core)	20m 5s
unit-tests (sagemaker-serve)	44m 3s
codestyle-doc-tests (sagemaker-serve)	7m 27s
codestyle-doc-tests (sagemaker-train)	7m 12s
unit-tests (sagemaker-train)	30m 26s
	5h 55m 38s

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