protoc-gen-openapiv2 generating the wrong schema fixing the issue #2635

[lakshkeswani]

References to other Issues or PRs

This PR Fixes the issue #2635

Have you read the Contributing Guidelines?

YES

Brief description of what is fixed or changed

Removed the duplication of required elements in the object schema by comparing it with the field schema only adding the unique ones .
Set the required array nil of field schema form swagger properties this is not required.
what is changed in the code?
Added the getUniqueFields method that will return the schema of unique fields.
simply append the unique one to the field schema.

Other comments

[johanbrandhorst]

Fix the build error as well please

[lakshkeswani]

Fix the build error as well please

where can I see the build error? its now showing up for me

[johanbrandhorst]

https://github.com/grpc-ecosystem/grpc-gateway/runs/7599846545?check_suite_focus=true
https://github.com/grpc-ecosystem/grpc-gateway/runs/7599846230?check_suite_focus=true
https://github.com/grpc-ecosystem/grpc-gateway/runs/7599846188?check_suite_focus=true

[johanbrandhorst]

This looks great, just a few whitespace fixes left!

[johanbrandhorst]

Looks like you need to pull master and regenerate.

[johanbrandhorst]

Hi @lakshkeswani, I want to make a new release soon, would you have time to rebase this change on master and regenerate the files?