Draft: Add additional Runscope SCIM tests

[bdemers]

Adds tests for:

• PUT /Users/ - add attributes
• PATCH /Users/ - disable user
• POST /Groups - create group
• GET /Groups/ - get group
• PUT /Groups/ - update group
• PATCH /Groups/ - update group users
• DELETE /Groups/ - delete group

TODO: These new tests are not needed for every type of implementation. For example, OIN apps have a different set of tests they MUST pass, for example, OIN apps will use a PATCH request when disabling a user, and a "custom" app will use a PUT.

NOTE: The ordering of the JSON properties has changed when using the Runscopes "export" feature; we may want to start running these files through a script that will use a deterministic ordering.