Allow Exact Synonyms in metadata validation (SCP-3631)

[jlchang]

Previously (#211), we relaxed ontology label matching to include synonyms and related synonyms (annotation:has_related_synonym), it seems some ontologies store their synonyms as annotation:has_exact_synonym rather than synonym. This PR addresses the has_exact_synonym wrinkle as the deprecation of diabetes mellitus (disease) to exact synonym in favor of diabetes mellitus also breaks existing test in single_cell_portal repo.

Additionally this PR fixes an error in (#216) where the original method was moved but not removed.

Follow the same testing instructions per #216
BUT test with valid array file from single_cell_portal repo
single_cell_portal/scripts/tests/data/valid_array_v2.1.2.txt
(the similarly named file in the ingest repo was updated in Sept due to the Exact Synonym issue).

This PR support SCP-3631.

[codecov]

Codecov Report

Merging #218 (8b0b2e0) into development (de22060) will decrease coverage by 0.25%.
The diff coverage is 83.33%.

@@               Coverage Diff               @@
##           development     #218      +/-   ##
===============================================
- Coverage        71.82%   71.57%   -0.26%     
===============================================
  Files               26       26              
  Lines             3099     3092       -7     
===============================================
- Hits              2226     2213      -13     
- Misses             873      879       +6     

Impacted Files	Coverage Δ
ingest/ingest_pipeline.py	64.10% <66.66%> (+2.21%)	⬆️
ingest/validation/validate_metadata.py	77.53% <100.00%> (+0.10%)	⬆️
ingest/genomes/utils.py	54.16% <0.00%> (-15.63%)	⬇️

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[jlchang]

Marking first build for the PR which failed then succeeded on retry.