Added missing format attribute in ovf:DiskSection in config writer
Update vagrant example for virtualbox
Cleanup KIWIOVFConfigWriter

Prevent use of uninitialized values
Fixed creation of virtualbox vagrant boxes

Add hardlink box-disk1.vmdk to real vmdk image in box tarball
Fixed KIWIOVFConfigWriter rasd:HostResource for ovf:/disk

The reference ID was set to a wrong value not matching the
ovf:DiskSection section