Remove checks for None dates in keypair functional tests

Steve made a comment about this and I agree, we should try and
keep these tests and simple as possible and this kind of thing
doesn't add much value.

Change-Id: I1eb73e5f38904ee6c74f6c7e27fc66cfe198619d

Author: TerryHowe

functional/tests/compute/v2/test_keypair.py

@@ -19,7 +19,7 @@ class KeypairTests(test.TestCase):
     """Functional tests for compute keypairs. """
     NAME = uuid.uuid4().hex
     HEADERS = ['Name']
-    FIELDS = ['deleted_at', 'name', 'updated_at']
+    FIELDS = ['name']
 
     @classmethod
     def setUpClass(cls):
@@ -40,5 +40,4 @@ def test_keypair_list(self):
     def test_keypair_show(self):
         opts = self.get_show_opts(self.FIELDS)
         raw_output = self.openstack('keypair show ' + self.NAME + opts)
-        expected = "None\n" + self.NAME + "\nNone\n"
-        self.assertEqual(expected, raw_output)
+        self.assertEqual(self.NAME + "\n", raw_output)