Query Parameters of type integer in format int64 seem to create a broken rest easy API

[lucafuji2]

Description

Very similar to #1226, but for rest easy instead.
Created a API Spec with a query parameter of type integer, with format int64 which results to Long in Java. Leads to a broken resteasy Api with the following signature:
@DefaultValue("0l") @QueryParam("offset") Long offset,

openapi-generator version

5.1.0

causing the problem (line of code or commit), or simply make a suggestion -->
remove the suffix for long, float, double etc, as in
#4969
https://github.com/OpenAPITools/openapi-generator/pull/4969/files#diff-9de34b4aad5de707e8aa0c031f20a6573f8f50826a437f0652c54b3788b37d41R869

[wing328]

Can you please file a PR to start with so that we can review the fix more easily?

[lucafuji]

@wing328 Thanks for merging the PR. A qq, when will be the next gradle plugin release which induces fix in this PR?

[wing328]

@lucafuji thanks for the fix. Please refer to https://github.com/OpenAPITools/openapi-generator/milestones for the release schedule (tentative)