Adds tree node zipper and tapper helpers to Cypher
Use Zipper for SemanticState scope tree
Adds more info to the AIOOBE, the contents of the buffer
Merge pull request #2971 from boggle/tree-zipper

Use a zipper for SemanticState scope tree
Disabled forceRotate tests for both batching/non-batching
Fix: when using page cache in store migration or tools make sure the sweeping thread is running

- this also applies to several tests