Momentarily (but never in tree), the `scope:` field was called
`parent:`. Apparently a few testcases were left behind with "parent" in
the name, so rename them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233560 91177308-0d34-0410-b5e6-96231b3b80d8