[BUG][Java][Vert.x] Path parameters are not properly url encoded

Created by: jekkel

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?
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Description

The generated vert.x web client code does not url encode path parameters and but they are simply put as is into the url path. So whenever the parameter contains incompatible characters the URL gets messed up.

openapi-generator version

latest master

Related issues/PRs

#5732

Suggest a fix

Just URL encode all path parameters before adding them to the path.