AIDA-77 Created found status.
AIDA-77 add uncertain to concept found status.
AIDA-77 More descriptive name.
AIDA-77 Use concept found status instead of eligibility classification.

- Rename class EligibilityClassification to ConceptFoundStatus.
- Rename EligibilityClassification values to concept found status values.
- Retain additional values of original ConceptFoundStatus enum.
AIDA-78 Rename class.