Parse required query params only

[rajesh-kg-20089]

Add query param only if the parameter object has required: true

[rajesh-kg-20089]

@ErikWittern,

By default, the query params listed in the parameters object are appended to url even if it is not a required field.
Instead of this can we append only required query param (i.e required: true) to the code snippets ?

Swagger also follows this approach for generating code snippets.

@ErikWittern please share your thoughts.

[michaelgwelch]

Oh, I like the idea of this PR. We have a few operations with really long example URLs