Ignore unsupported scopes instead of failing
Ignore unsupported scopes instead of failing

According to https://openid.net/specs/openid-connect-core-1_0.html
3.1.2.1 : " Scope values used that are not understood by an
implementation SHOULD be ignored"
Unsupported scopes are handled gracefully already in
https://github.com/OpenIDC/pyoidc/blob/master/src/oic/oic/__init__.py#L1773

its-dirg/pyop