Some ontology searches do not return the expected results

[arisf]

Notice that "diffuse glioma" is a parent of "glioblastoma" in the NCI Thesaurus. When execuring a search for the term "diffuse glioma" (quotes included) we get zero results back. So far so good, presumably there are no observations matching the term. But then, when clicking on the "Ontology Search" button, nothing is returned either, despite the fact that the child subject "gliobastoma" is associated with many observations. Per the specification of the ontology search functionality (issue #487), the "glioblastoma" subject should have been returned.

[zhouji2013]

This is because "diffuse glioma" C129325 is not in the background data. The source of the background data is NCI_thesaurus_terms.txt. We need Vlado's help to verify when and how this file is updated.

[arisf]

Confirmed fixed on development server.

[arisf]

Verified on production server.