At present, the AccessGrantClient processes Access Credentials with either the shorter localname (e.g. SolidAccessGrant, SolidAccessRequest, SolidAccessDenial) or the fully qualified name (e.g. http://www.w3.org/ns/solid/vc#SolidAccessGrant). There are cases where a qualified name, such as vc:AccessGrantDenial, will be returned from an Access Grant server, and these should be supported as well.

Resolves #1407

Specifically, this adds support for qualified type names with the vc: prefix across the various Access Grant types. In addition, the testing has been expanded to include better coverage of SolidAccessDenial types.