AWS::CodeBuild::Project - VpcConfig

## 1. Title
AWS::CodeBuild::Project-VpcConfig

## 2. Scope of request
Removing the VpcConfig property from the template should remove it from the CodeBuild project, which it currently does not.

## 3. Expected behavior

In Update, removing the VpcConfig attribute should update the CodeBuild project and remove its VPC configuration.

## 4. Suggest specific test cases

Create AWS::CodeBuild::Project with VpcConfig specified, then try to remove it.
Success: Physical CodeBuild project has its VpcConfig removed
Fail: Template/stack gets updated without any real changes to the CodeBuild project - becoming out of sync.

## 5. Helpful Links to speed up research and evaluation

https://docs.aws.amazon.com/codebuild/latest/APIReference/API_UpdateProject.html

## 6. Category (required) - Will help with tagging and be easier to find by other users to +1

10. Developer Tools (CodeStar, ...)

## 7. Any additional context (optional)