* OutNetMessage: Remove setters, make fields final

router/java/src/net/i2p/router/OutNetMessage.java

...java/src/net/i2p/router/message/SendMessageDirectJob.java

...er/networkdb/kademlia/FloodfillNetworkDatabaseFacade.java

.../java/src/net/i2p/router/networkdb/kademlia/StoreJob.java

...src/net/i2p/router/transport/OutboundMessageRegistry.java

...ava/src/net/i2p/router/transport/ntcp/NTCPConnection.java

...ava/src/net/i2p/router/tunnel/InboundGatewayReceiver.java

...src/net/i2p/router/tunnel/OutboundMessageDistributor.java

router/java/src/net/i2p/router/tunnel/OutboundReceiver.java

router/java/src/net/i2p/router/tunnel/TunnelParticipant.java

router/java/src/net/i2p/router/tunnel/pool/BuildHandler.java

...r/java/src/net/i2p/router/tunnel/pool/BuildRequestor.java