[BUG][MAVEN] Plugin noisy when no servers are defined

Created by: maschoene

Description

When omitting the optional servers field in the OpenAPI object (v3), the openapi-generator-maven-plugin renders the warning:

[WARNING] 'host' (OAS 2.0) or 'servers' (OAS 3.0) not defined in the spec. Default to [http://localhost] for server URL [http://localhost/]

multiple times. I expect the generator to at most inform me of it.

openapi-generator version

4.3.1

OpenAPI declaration file content or url

n/a

Command line used for generation

vanilla maven execution

Steps to reproduce

Use a setup as described. If really necessary I can try to create a reproducer.

Related issues/PRs

I could not find any.

Suggest a fix

Be less noisy, PR incoming.