Fix shards db name typo from previous commit

Previous commit which switched to using mem3 for replicator shard
discovery introduced a typo.

 `config:get("mem3", "shard_db", "dbs")`

should be:

 `config:get("mem3", "shards_db", "_dbs")`

COUCHDB-3277
1 file changed
tree: e83a583c522707af5e908972889251bba050d015
  1. priv/
  2. src/
  3. test/
  4. .gitignore
  5. .travis.yml
  6. LICENSE