Some suggestions about this repository

## Repository specific suggestions

1. Move from `Azure` to `Azure-Samples` Organization. `Azure-Samples` is more reasonable because it's a sample.
2. Update [README.md](https://github.com/Azure/spring-boot-container-quickstart/blob/d3d136f62adab71a2adb4dd7d69e29de0015e20c/README.md), for example: `mvn package` will not work because there is no `pom` file in root directory.
3. Use a simple spring-boot web project instead of a `spring-boot-pet-clinic.jar`, so customer can have a better understanding what is happening. The pet-clinic's business logic is not important if we just want to teach customer how to run spring-boot application on Azure container platforms.

## Common suggestion to all samples about `spring and azure`

Refer to: https://github.com/chenrujun/spring-and-azure-product-sample-template/issues/1