veyron/service/store/memstore: Log deletions after every commit.

go/vcl/1590 intended to log deletions after every commit, but did not
because of an incorrect error check.
This change fixes that bug, and adds a simple test.

Change-Id: I29740f5d7be5d81f7158df3b92b46c8f7db5e3cc
2 files changed
tree: 05f60193fb2807c313131799bda98697070c0d5b
  1. examples/
  2. lib/
  3. runtimes/
  4. security/
  5. services/
  6. tools/