Fix 'keypair show' command output

The attempt to get the data dict out of the keypair resource object uses a
key 'keypair. This is incorrect, no key is required.

Closes-Bug: 1289594
Change-Id: I7887119c1d800d389cb6f63ea7847bea1e25bb52

Author: Dean Troyer

openstackclient/compute/v2/keypair.py

@@ -146,7 +146,7 @@ def take_action(self, parsed_args):
                                       parsed_args.name)
 
         info = {}
-        info.update(keypair._info['keypair'])
+        info.update(keypair._info)
         if not parsed_args.public_key:
             del info['public_key']
             return zip(*sorted(six.iteritems(info)))