improve error message for task csv-to-oscal-cd when creating property with namespace that is missing or invalid

[degenaro]

Issue description / feature objectives

before:
RuntimeError: Invalid property row: 3 name: Rule_Id value: workers-in-inventory-appear-in-latest-iks-scan ns: xyz remarks: rule_set_00

after:
RuntimeError: property for row: 3 ns: xyz is invalid

Caveats / Assumptions

N/A

Completion Criteria

code and test cases