Refactor vcloud-director

fix rat
initial working impl for VCloudDirectorComputeAdapter
fix for multi-vms template
added networkName for the Adapter
vcloud-director: depend on jclouds 1.8.1 instead of 1.8.0
revisit the vApp networking
release vcloud-director 1.8.2-alpha-cloudsoft.6
improve exception message
general cleanup
use name properly