3.6.8-node_types-02-valid-required-only

[lucboutier]

Test for a node type with only the required keynames.
See https://github.com/oasis-open/tosca-test-assertions/blob/master/Parser-Validator/3.6.6-capability_types-02-valid-required-only.yml to get started.

[lucboutier]

Assigned to Paul Lipton