Assorted fixes to router Junit tests for changes in the source

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

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

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

router/java/test/junit/net/i2p/router/SSUDemo.java

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

...va/test/junit/net/i2p/router/tunnel/BuildMessageTest.java