Integration tests for Google Cloud Run (GONRG-1016)

Type of change

• Bug Fix
• Feature

#2 (closed)

Does this introduce a change in the core logic?

• [Yes]

Does this introduce a change in the cloud provider implementation, if so which cloud?

• AWS
• Azure
• GCP
• IBM

Does this introduce a breaking change?

• [Yes]

What is the current behavior?

Google Cloud Run returns a default content-type = 'text/html'.

What is the new/expected behavior?

Fixed integration tests for Google Cloud Run.

Have you added/updated Unit Tests and Integration Tests?

• [Yes]

Any other useful information

Changes: Changed an anotation 'ControllerAdvice' to 'RestControllerAdvice' for GlobalOtherExceptionMapper and GlobalExceptionMapper.

Fixed int tests.

Updated GCP README.md.