Full Changelog: 3.0.3...3.0.4-rc
RIOT-1076: Drop unknown metric ids during deserialization instead of throwing
RIOT-1076: Add BROKER_CONNECTION_COUNT and BROKER_CONNECTION_CAPACITY metric types
RIOT-1076: Add optional connectionCapacity to BrokerCapacityInfo and Broker
RIOT-1076: Report broker connection-count and max-connections from socket-server-metrics
RIOT-1076: Thread broker-only aggregator output into Broker.load()