[java][vertx] moved HttpStatusException (vertx internal) to HttpException (public)

Created by: seanbrown-com

Vertx has moved HttpStatusException (vertx internal) to HttpException (public)

https://github.com/vert-x3/wiki/wiki/4.1.0-Deprecations-and-breaking-changes#iovertxextwebhandlerimplhttpstatusexception

This is a breaking change in vertx, so this is a priority fix. The changes can be tested by adding the plugin to a Java project and building with vertx-core and vertx-web on the current version, 4.2.4.

@bbdouglas (2017/07) @sreeshas (2017/08) @jfiala (2017/08) @lukoyanov (2017/09) @cbornet (2017/09) @jeff9finger (2018/01) @karismann (2019/03) @Zomzog (2019/04) @lwlee2608 (2019/10)

NOTE: A similar PR is at https://github.com/OpenAPITools/openapi-generator/pull/10299, but author has been inactive and has not addressed issues with the PR mentioned by @wing328 .

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