add props 'showPages' and 'collectInformation' to GetOnboardingUrlRequest

[fipp]

Description
Interacting with a Adyen business developer Robert Ruppi, we (FINNnoECOM) got forwarded extra config flags "showPages" and "collectInformation" to send to the create hosted onbarding page url endpoint, to tailor what is shown and what is collected. Currently we call the API directly without using the SDK, but it would be nice to get this into the SDK as well.

Tested scenarios
I built the SDK as 17.0.1-SNAPSHOT and included it in our repo. and tested it towards the test environment where I successfully got back an hosted onboarding page url. Not tested towards the live environment as we don't have set up that environment yet. (Working on it though).

[coveralls]

Coverage increased (+0.02%) to 29.344% when pulling 852aecb on fipp:add-hop-showpages-collectinformation into cf87589 on Adyen:develop.

[fipp]

See https://docs.adyen.com/api-explorer/#/Hop/v6/post/getOnboardingUrl for docs on 'showPages' and 'collectInformation'

[wboereboom]

hey @fipp,

Thank you for submitting this PR!
All looks well, apart from the toString functions in the new models.
Please look at the suggestions I provided. This follows the format of all other models in the library.

I very much appreciate your contribution, and apologies for the slow response!

Kind regards,
Wouter
Adyen

[fipp]

Thank you for submitting this PR! All looks well, apart from the toString functions in the new models. Please look at the suggestions I provided. This follows the format of all other models in the library.

I very much appreciate your contribution, and apologies for the slow response!

Ah I see! I accepted your commits and added one myself for the rest. Does it seem correct now?