[facade] fix contributor resolution permanently skipping commits with null cmt_ght_author_id#3792

mn-ram wants to merge 3 commits intoaugurlabs:mainaugurlabs/augur:mainfrom

mn-ram:fix/facade-contributor-resolution-skips-null-cmt-ght-authormn-ram/augur:fix/facade-contributor-resolution-skips-null-cmt-ght-authorCopy head branch name to clipboard