Adds custom jclouds-softlayer, and live tests

- adds 1.6.1-cloudsoft.1 build of jclouds-softlayer
- adds AbstractSoftlayerLiveTest and TomcatServerSoftlayerLiveTest

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Note these tests do not pass unless you have the workaround I added in a comment at https://github.com/jclouds/jclouds/pull/77 - the tests are currently marked as "WIP".