[BUG] [JAVA] OAS3 incorrect data type when providing a default value

Created by: kevinparaport

Bug Report Checklist

Have you provided a full/minimal spec to reproduce the issue?
Have you validated the input using an OpenAPI validator (example)?
Have you tested with the latest master to confirm the issue still exists?
Have you searched for related issues/PRs?
What's the actual output vs expected output?
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Description

When providing a default value, UI is saying the value is a string when it's an integer. Example JSON shows the variable as the correct data type though.

openapi-generator version

5.3.1

OpenAPI declaration file content or url

        - name: page
          in: query
          description: Zero-based page index of results to return
          required: false
          schema:
            type: integer
            format: int32
            default: 100

Generation Details

Using OAS3 = true

Related issues/PRs

https://github.com/OpenAPITools/openapi-generator/pull/9775

Suggest a fix/enhancement

My guess is that the OAS3 changes for Java just aren't setting the type correctly in the mustache templates.