ignore some unsed values of Physical Device information of arcconf

 [         Expander ID                        : 0]
 [         Enclosure Logical Identifier       : DEADBEEFDEADBEEF]
 [         Expander SAS Address               : DEADBEEFDEADBEEF]
Merge pull request #51 from evgeni/master

ignore some unsed values of Physical Device information of arcconf (#51)