Fixes neutronclient lb-member-show command

The current lb-member-show command uses the id or name for querying.
Since the lb members do not have names, the query returns false
positives.
The unit test for id or name was removed.
Closes-Bug: #1380937
Change-Id: I804cb9d11f5208ea2d7baa58c9d878db93851517
Merge "Fixes neutronclient lb-member-show command"