Split GPI parents field on pipes

[balhoff]

The recent change to the NEO build uncovered an existing problem where the parents column was not being split on pipes. So ids were being concatenated together with encoded pipes:

<!-- http://identifiers.org/wormbase/CE01192 -->

    <owl:Class rdf:about="http://identifiers.org/wormbase/CE01192">
        <rdfs:subClassOf>
            <owl:Restriction>
                <owl:onProperty rdf:resource="http://purl.obolibrary.org/obo/go/noctua/neo#has_gene_template"/>
                <owl:someValuesFrom rdf:resource="http://identifiers.org/wormbase/F44D12.3%7CWB%3AF44D12.5%7CWB%3AF44D12.7%7CWB%3AC35D10.11"/>
            </owl:Restriction>
        </rdfs:subClassOf>
    </owl:Class>

[kltm]

Looks like additional separation as discussed.