COUDSTACK-3053 Template creation from snapshot is failing on VMware setup

Fixed snapshot vmdk file path while copying snapshot files to template path.

Signed-off-by: Sateesh Chodapuneedi <sateesh@apache.org>
CLOUDSTACK-3879 [VMware] NPE while attempting to create template from volume

Signed-off-by: Sateesh Chodapuneedi <sateesh@apache.org>