veyron/services/store/memstore/query: Handle QueryResult.Fields when present.

If a query uses selection, subsequent pipelines must refer to the
fields produced by that selection.

Added more todos for things that I need to implement and test.
They are dependent on sorting for deterministic tests, so I
can't do them now.

Change-Id: I0f30a1a5edc6bbe342c1fb0d1c41a511b1f3b000
2 files changed
tree: 5e0f66ccc4891ff24778f96d70816225bd8cb3a2
  1. examples/
  2. lib/
  3. runtimes/
  4. security/
  5. services/
  6. tools/