CodegenParameter and CodegenResponse have Boolean fields.

[sreeshas]

Description

CodegenParameter and CodegenResponse classes have Boolean fields where as
CodegenOperation and CodegenProperty have boolean fields.

Boolean fields are not necessary and requires users to check for null before using them which leads to ugly code.

Suggest a Fix

Change the fields to boolean.

[sreeshas]

PR #4747 has the fix for this issue.

[wing328]

#4747 merged into master.