message: Set default ports Druid
  For Druid set the default port for the broker and coordinator.
diff: @@ -69,11 +69,11 @@ class DruidCluster(Model, AuditMixinNullable):
  # short unique name, used in permissions
  cluster_name = Column(String(250), unique=True)
  coordinator_host = Column(String(255))
  - coordinator_port = Column(Integer)
  + coordinator_port = Column(Integer, default=8081)
  coordinator_endpoint = Column(
  String(255), default='druid/coordinator/v1/metadata')
  broker_host = Column(String(255))
  - broker_port = Column(Integer)
  + broker_port = Column(Integer, default=8082)
  broker_endpoint = Column(String(255), default='druid/v2')
  metadata_last_refreshed = Column(DateTime)
  cache_timeout = Column(Integer)
  