Description of problem: debug plugins are packaged both in 'otopi' and in 'otopi-debug-plugins'.
Perhaps 4.0.5? Already merged to otopi-1.5 branch.
done
Postponed to 4.0.6 not being worth to issue a release just for this.
Verified in otopi-1.6.0-0.2.master.gitaa0a779.el7ev.noarch