Use a multi-master safes persistent sequence

Use the new FsSequence for both the tail and head making them MM safe.
The event storage still needs to be synchronized with the head sequence
for it to be MM safe.  This is a big step towards making the store fully
MM safe.

Change-Id: I95b378c799bdb698d865cf17c6de7709e9a79760
8 files changed
tree: 002c90268414e012dcd4077ef0f257ea20ec27ba
  1. src/
  2. test/
  3. .gitignore
  4. pom.xml