Issue: Lambda Function Name Discrepancy in chalice package sam.json file

When I create a lambda function using AWS chalice and specify a custom name with the @app.lambda_function(name="my_lambda_function") , I noticed that the name in the generated sam.json file is being changed to something like ("MyLambdaFunction") instead of the specified name

Reproduce the issue with AWS Chalice using @app.lambda_function(name="my_lambda_function") and inspect the generated sam.json file. Trace the generation path that changes the specified name to "MyLambdaFunction"; done means the SAM file preserves the custom Lambda name.

Written by the indexing model from the issue text.