[Cherry-pick] Increase wait period for sagemaker resource

[jsitu777]

Cherry pick #227

[ack-prow]

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[ack-prow]

@jsitu777: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
sagemaker-metadata-file-test	0efd74e	link	true	/test sagemaker-metadata-file-test

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