Add openapi2soapui

## Tool Properties

- Display name: openapi2soapui
- Description: Tool to convert openapi to soapui format. 
- Repository: https://github.com/apiaddicts/openapi2soapui
- Homepage: https://github.com/apiaddicts/openapi2soapui

## OpenAPI Versions

> **Please indicate the versions of OpenAPI supported by your tool by marking them true or false below.**

- 3.1: false
- 3.0: true
- 2.0: true
