Don't fail if virtual package is provided

Design states that "If a real package of the same name exists, an error
is reported." but provided candidates aren't packages of the same name
so previous implementation could be seens as invalid.
2 jobs for virtual-fix in 7 minutes and 22 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #33036
test

00:07:00

passed #33037
test_busybox

00:07:22