Router JUnit tests: type arguments, unused imports

router/java/test/junit/net/i2p/data/i2np/DateMessage.java

...est/junit/net/i2p/data/i2np/DeliveryInstructionsTest.java

...ava/test/junit/net/i2p/data/i2np/TunnelCreateMessage.java

...st/junit/net/i2p/data/i2np/TunnelCreateStatusMessage.java

...est/junit/net/i2p/router/message/BuildTestMessageJob.java

...t/net/i2p/router/message/OutboundClientMessageStatus.java

...java/test/junit/net/i2p/router/message/SendGarlicJob.java

...it/net/i2p/router/networkdb/kademlia/RouterGenerator.java

...t/i2p/router/transport/udp/UDPEndpointTestStandalone.java

...a/test/junit/net/i2p/router/transport/udp/UDPFlooder.java

...test/junit/net/i2p/router/tunnel/BatchedFragmentTest.java

...r/java/test/junit/net/i2p/router/tunnel/FragmentTest.java

...ava/test/junit/net/i2p/router/tunnel/GatewayTestBase.java

...r/java/test/junit/net/i2p/router/tunnel/OutboundTest.java