Clarified purpose of namespace in INSTANCENAME
Clarified purpose of namespace in INSTANCENAME

Details:

* Clarified that a namespace in INSTANCENAME must be the target namespace,
  and that the purpose of being able to specify a namespace in INSTANCENAME
  is to use returned instance names that may contain a namespace, unchanged.

Signed-off-by: Andreas Maier <38dbb04957d222ea6ce72de72413b1e55e665472@de.ibm.com>

pywbem/pywbemtools,pywbem/pywbemtools