dependencies for ingest_rels_ext & ingest_solr_doc may be backwards

[sdm7g]

:ingest_rels_ext chains to :ingest_solr_doc
# Since the creation of a solr now requires both the rels-ext and descMetadata of an object, we must create both before a message is sent to ingest_solr_doc
https://github.com/uvalib-dcs/tracksys/blob/master/app/processors/ingest_rels_ext_processor.rb#L43-L45
but :ingest_solr_doc does not call :ingest_rels_ext first.
From the comment in the code, and to avoid generating the wrong solr docs, it seems that it ought to be the other way around. If you ask to update the solr doc, it ought to update the rels_ext dependency first.
( I was tripped up on this on updating Our Mountain Work )

[louffoster]

no longer valid; workflow refactored