Added parsing of the function node in the serverless.yml

[samueleresca]

Description of changes:
Added parsing for the function based serverless.yml definition. The YAML parser now can handle the following syntax :

# serverless.yml
service: myService

provider:
  name: aws
  runtime: dotnetcore2.1
  memorySize: 512 # will be inherited by all functions

functions:
  createfunction:
    handler: DotNetServerless.Lambda::DotNetServerless.Lambda.Functions.CreateItemFunction::Ru

As described in the getting started present in the serverless framework web site

Should we create a dedicated parser class for that?

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[normj]

How is this PR different then the one I merged into the dev branch? #357

Also it looks like something went wrong with the gitignore. Files under Tools/LambdaTestTool/Amazon.Lambda.TestTool/ExternalCommands/App should not have been checked in as those are the build artifacts from Amazon.Lambda.TestTool.ExternalCommands.

[samueleresca]

Hi @normj , sorry I haven't noticed the Dlls in the App folder. Now it should be fine. The difference between this and the #357 is in the format of the serverless.yaml file.

• The Add Yaml CloudFormation support in Lambda Test Tool #357 parses the following resource based syntax of the serverless.yaml:
  https://github.com/aws/aws-lambda-dotnet/blob/dev/Tools/LambdaTestTool/LambdaFunctions/ServerlessTemplateYamlExample/serverless.yaml

• This one parses the following syntax :
  https://github.com/aws/aws-lambda-dotnet/blob/b8bb2811695b4d4cafc412ecd3a98a9b3b5ecf15/Tools/LambdaTestTool/LambdaFunctions/ServerlessFunctionTemplateYamlExample/serverless.yml

Let me know

[slang25]

Just to remove any doubt for readers, ServerlessTemplateYamlExample is the "AWS Serverless Transform", i.e. vanilla CloudFormation.
ServerlessFunctionTemplateYamlExample is the serverless framework. Who knew that would get confusing 😄

[normj]

In case you were worried about not getting feedback in a bit. I'm on Christmas vacation and will catch up with this when I'm back in the office.

[normj]

Merged into dev so it will go out with the next release of the tool. I'll comment back on the PR when the release happens.

[samueleresca]

@normj Thanks 👍

[normj]

Version 0.9.0 was released today with this PR. Thanks for the help.