Don't scan empty replicator databases

Every account gets a _replicator database created by default, the
burden of scanning them all is considerable.

Don't start a changes reader if the database is empty (excluding the
injected _design/replicator design document)

BugzID: 84311
1 file changed
tree: e6d53f8c48b41b77216929e3be752453c470ef7e
  1. .gitignore
  2. .travis.yml
  4. priv/
  5. src/
  6. test/