Latest batch of 3651 WB and 19098 MGI import models

[dustine32]

Generated using geneontology/gocamgen@144fb3d

Reports:

source_path: http://current.geneontology.org/annotations/wb.gpad.gz
download_date: Mon May  6 13:38:49 2019
header_date:
# of models generated: 3651

source_path: http://www.informatics.jax.org/downloads/reports/mgi.gpa.gz
download_date: Mon May  6 13:41:37 2019
header_date: 05/03/2019
# of models generated: 19837

Once again, the MGI model count discrepancy between report and PR are due to non-MGI entities (e.g. PR, UniProtKB, RefSeq) still being translated by the code. Only MGI and WB entity models are in this PR.