[AWS/Sagemaker] Reduce Code Base

[nkpng2k]

After research stemming from gcp deployment methodology. I believe it is possible to remove a fair amount of code from AWS Sagemaker deployment template and make it depend on the local rest scorer/extend it.

There are only 2 requirements that would need to change as is different from local-rest-scorer

• override /model/score endpoint to /invocations
• add endpoint for /ping for health check