Add GO-CAM stats

[dustine32]

For geneontology/go-site#1180.

Remaining issues to solve before merging:

• Parameterize blazegraph_url for triplestore created in Jenkins context similar to golrurl param. Likely will be localhost-something? Tagging @kltm.
• networkx error (shown below) was occuring when using networkx==1.11 as previously specified in requirements.txt. I upped this to 2.2 to match version installed in Jenkins go-stats stage and the error was fixed.
• How to handle the new gocams fields not appearing in the previous go-stats.json accessed from curent.geneontology.org? On the first run with this change, this field being omitted will break go-stats in several places. We might need to coordinate merging this PR with the data being "updated" on current?

The networkx error mentioned above:

File "/Users/ebertdu/go/go-stats/libraries/go-stats/obo_parser.py", line 462, in get_term
    return self.obo_graph.nodes[query]['object']
TypeError: 'method' object is not subscriptable

Edit: change numbered list to checkboxes.

[kltm]

@dustine32 I think I'm maybe not understanding the complete context of what's going on here--I had thought we had wrapped up go-stats work?
In general, parameters are "good". what the blazegraph_url would be set to would depend on where you're using it. If inside a docker image, that would likely be localhost:XYX or something (probably in the Jenkinsfile). If you're interested in an external context, that would be the public URL.

[dustine32]

@kltm This request for adding some simple GO-CAM stats came out of the Alliance pathways call discussing geneontology/noctua#736. Actually, sorry, I realize now we didn't really prioritize this work other than just trying to get something in before @lpalbou's last day. We can decide when to continue the work of getting the change into the GO pipeline later.

[lpalbou]

@kltm for a little bit of context, this has indeed nothing to do with the handover of the GO stats, except maybe giving some training / understanding of the code to @dustine32 . However, we had a request last week from Helen and the Alliance Pathway group, following the issues we had with the last GO release where some GO-CAMs were missing geneontology/noctua#736. It was then proposed to add a simple stats about GO-CAMs to make sure that prior to a release, the number would not be too different, or at least could be double checked by Pascale or QA team.

[dustine32]

I just added a method to fill in zero values when gocams stats are not in previous stats during comparison. This solves the third issue from above: the first run of these go-stats with the new gocams fields will be missing these fields in the previous go-stats.json on current.geneontology.org.