removed test plank
Squashed 'test/plank/' content from commit 09a9867

git-subtree-dir: test/plank
git-subtree-split: 09a9867765f3efc9ef9ff747b7acd8e42a8dcfed
Merge commit '6f8e60df58318d481c5c7cb3ec86586cd2cb1921' as 'test/plank'
fix build eror and bogus test