Using the jclouds version for Chef, rather than the project version

During releases, the reference should be to the released version of jclouds and jclouds-chef
Using ServiceMix bundles for JSch and sshj agentproxy deps

Follow-up to 094f698f. See

* https://issues.apache.org/jira/browse/SMX4-1728
* https://issues.apache.org/jira/browse/SMX4-1729
Removing the JSch agentproxy binding and the sshj agentproxy bundle