- eliminate getOVFConfig_legacy
- remove des_cpu and des_memory attributes
  + des_cpu == ncpus and des_memory == memory we do not need 2
    attributes to describe the same value
  + fix typo of ovfformat name, it is "powervm" not "povervm"
  + the schema version did NOT change thus users must fix the
    config file manually if they used "des_cpu", "des_memory",
    and "povervm"
- implement writing of configured information into the .ovf
  configuration file
  + memory and limits
  + cpu and limits
  + devices
- fix link bug
  + the image file in the .ovf directoy was a dangling link
    as the link created was not pointing to the proper location
- update the tests to account for the removed attributes
- fix typo in method name "...Machine..." not "...Maschine..."