getIdentifier should work with non-obolibrary PURLs (required for solr loading)

[cmungall]

OWLGraphWrapperExtended

	/**
	 * gets the OBO-style ID of the specified object. E.g. "GO:0008150"
	 * 
	 * @param iriId
	 * @return OBO-style identifier, using obo2owl mapping
	 */
	public String getIdentifier(IRI iriId) {
		return Owl2Obo.getIdentifier(iriId);
	}

Instead it should:

1. Check if the IRI starts with the obolib prefix, if yes, use Owl2Obo.getIdentifier
2. If no, check if oboInOw#id is present. if so, use it

In future we may also want the ability to use prefixcommons curie util to do this in a custom way

[cmungall]

Test case:

Prefix: GO: <http://purl.obolibrary.org/obo/GO_>
Prefix: x <http://example.org/>
Prefix: oboInOwl: <http://www.geneontology.org/formats/oboInOwl#>

Ontology: <http://purl.obolibrary.org/obo/test>

AnnotationProperty: oboInOwl:id
        
Class: GO:0000001
    Annotations:
        rdfs:label "test1"

Class: GO:0000002
    Annotations:
        rdfs:label "test2",
        oboInOwl:id "FAKE:1234"

Class: x:005
    Annotations:
        rdfs:label "test3",
        oboInOwl:id "X:5"

The IDs should be GO:0000001, GO:0000002, X:5

[cmungall]

One more test

Class: x:010
    Annotations:
        rdfs:label "test4"

should preserve URL

[cmungall]

@yy20716 can you add one more test, as above?

[yy20716]

Thank you for your reminder. I added that case in this pull request.

[yy20716]

I guess this issue can be closed but please let me know if you encounter any other problems. Thank you.

[kltm]

Looking good so far.