Adopt the scim2-models exception classes #39
Description
This is a follow-up to #37
We should think of using the scim2-models exception classes instead of custom scim2-client classes to handle client-side validation errors and transforming server-side scim Error objects.
I guess the scim2-client SCIMRequestError or RequestNetworkError can be used to handle network errors. I am not sure if SCIMResponseError is still useful, maybe to handle status codes?