Switching to Tuscany 1.6 release for Travel Sample

[Raymond Feng]

Hi,

I'm starting to change the Tuscany dependencies for TravelSample to be 1.6 
(the latest 1.x release). Hopefully, we can release the tutorial in the near 
future.

Thanks,
Raymond
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Raymond Feng
Apache Tuscany PMC Member: http://tuscany.apache.org
Co-author of Tuscany In Action (A book on Tuscany SCA): 
http://tuscanyinaction.com/
www.enjoyjava.com
http://twitter.com/raymondfeng