Reactome Pathway Column Links are broken (404). conf/xrefs.json needs updating

[DoctorBud]

I just noticed that the Pathway column links on pages like https://monarchinitiative.org/gene/NCBIGene:388552#pathways give a 404 at Reactome.

• Bad link: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=REACT_R-HSA-432722
• Should be: https://reactome.org/content/detail/R-HSA-432722

My guess is that MonarchApp is using a stale version of the Reactome API, and that is because we have a stale version of this file:
https://github.com/monarch-initiative/monarch-app/blob/master/conf/xrefs.json

[jmcmurry]

all xrefs and external links should be driven by curie_map.yaml
We need alignment badly

[TomConlin]

according to monarch-initiative/dipper#556
dipper is producing 1,114,687 REACT curies which are born going to
'REACT': 'http://www.reactome.org/PathwayBrowser/#/'

which by default would take you to a very fancy page:

https://reactome.org/PathwayBrowser/#/R-HSA-432722

note: we should update our curie to https:// to save them a redirect