extended Openstack rebuild server options

https://issues.apache.org/jira/browse/JCLOUDS-350

jclouds openstack extended rebuild server options to support changes to 
password ipv4 ipv6 and server name +live test 

the live test is an extension of the same class that is in PR #179 so if #179 is merged first only the rebuild test should be added to the class (and not the entire class)