RNAcentral IDs incorrectly use OBO PURL namespace

[balhoff]

I believe this is the cause of ShEx violations caused by missing root types, noted here:
#99
geneontology/minerva#481

[kltm]

@balhoff Regarding #101
What is a positive or negative test we can use to prove that this worked when we go for our next update?

[balhoff]

@kltm after this change, NEO should no longer contain a term http://purl.obolibrary.org/obo/RNAcentral#_URS000229B2C9_9606. It should now contain a term http://rnacentral.org/rna/URS000229B2C9_9606.

[kltm]

Some browsing on early products seems to essentially confirm that the change is in place:

$ zgrep -a "URS000229B2C9_9606" blazegraph-go-lego-reacto-neo.jnl.gz | grep -a -c purl
0
$ zgrep -a "URS000229B2C9_9606" blazegraph-go-lego-reacto-neo.jnl.gz | grep -a -c rnacentral
1

[kltm]

Can close once in production (Thursday, if no incident) so that other issues know to revisit.

[kltm]

This should be out.