chore: add refcontent to XML reference output

[stefanomunarini]

#27 https://github.com/ietf-ribose/bibxml-service/issues/228 #22

[stefanomunarini]

@strogonoff the tests are failing here, but they are fixed #25 --> where other tests are broken at the same time, tho.

[ronaldtse]

@stefanomunarini then how about you merge #25 into #26 then we can see tests passing?

[stefanomunarini]

@ronaldtse #25 fixes the error identified here by the CI. However, in 25 I add schema validation, which fails for some datasets. Until the schema validation issue is fixed, the tests CI will always fail

[ronaldtse]

Thanks @stefanomunarini , can you elaborate on the exact schema failures right now so we can investigate?

[stefanomunarini]

@ronaldtse please see #28 . And also, here you can see all the errors reported by the CI https://github.com/relaton/relaton-py/runs/7323737499?check_suite_focus=true