body parameters are not requiredParams

[jonschoning]

------------------------------|~~~~~~~~~~~~~~~~|
                if (p.required || p.isBodyParam) {
                    requiredParams.add(p.copy());

https://github.com/swagger-api/swagger-codegen/blob/master/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java#L2238-L2239

c.f. c2eb53a

[wing328]

You're right. Body parameters can be optional as well.

Let me fix it shortly.

[wing328]

Filed #6885

[wing328]

@jonschoning the fix has been merged into master. Please pull the latest master to give it a try.