JCLOUDS-104: Cleaning up CLI POMs

* module jclouds-cli-project -> project
* removing unnecessary duplicate versions and group IDs

Follow-on from bb56570

Tested as follows:

* `mvn clean package` succeeds
* `mvn release:prepare` seems to ["do the right thing"](http://pastie.org/private/uu7wabhqfpdzzplzibgsza)

**Please verify by running `mvn release:prepare` locally**