Fix return value of Shard#even_split_id_range
No method DB#standby_slaves, use DB#slaves
temporarily need a sync_configuration after assigning new shard masters, will clean up soon
fix typo in previous commit
jetpants_collins: add method Pool#collins_creation_timestamp, which can be useful for external automation that needs to select or reject new pools
Merge branch 'schema_core_integration' of github.com:tumblr/jetpants into schema_core_integration
Integration changes