Upgrade JClouds to version 1.7.1, in order to support changes between Java versions 1.7.0_45 and 1.7.0_51.  See https://issues.apache.org/jira/browse/JCLOUDS-427
Merge pull request #1 from aheiss1/jclouds-update

Upgrade JClouds to version 1.7.1, in order to support changes between Ja...