simple tester should flag missing annotation property binding

```
annotations:
- annotationProperty: oio:hasExactSynonym
text: "acquired %s"
vars:
- disease
```

I dont know why, but this all by itself is rejected by dosdp tools (so I assume the spec rejects this)

This is accepted:

```
annotationProperties:
exact_synonym: oio:hasExactSynonym

annotations:
- annotationProperty: exact_synonym
text: "acquired %s"
vars:
- disease
```

@dosumis can you confirm which is at fault, the spec or DOSDP tools?

Compare the two YAML examples against the DOSDP specification and the simple tester behavior. Determine whether a direct annotationProperty value should be accepted or whether a declared binding is required, then update the tester or specification accordingly and verify the reported example.

Written by the indexing model from the issue text.