Fix config drive code logical error.

Image id has changed to uuid, so bool value can't be a image ID
any more, remove unnecessary test code.

fix bug #1181991

Change-Id: I420e4cdb848401375b347d43e06343efaa7bf5fc
(cherry picked from commit 4f44cd9)

nova/compute/api.py

@@ -479,19 +479,15 @@ def _apply_instance_name_template(self, context, instance, index):
         return instance
 
     def _check_config_drive(self, context, config_drive):
-        bool_like = True
         try:
-            strutils.bool_from_string(config_drive, strict=True)
+            bool_like = strutils.bool_from_string(config_drive, strict=True)
         except ValueError:
             bool_like = False
 
         if config_drive is None:
             return None, None
-        elif bool_like and config_drive not in (0, 1, '0', '1'):
-            # NOTE(sirp): '0' and '1' could be a bool value or an ID.  Since
-            # there are many other ways to specify bools (e.g. 't', 'f'), it's
-            # better to treat as an ID.
-            return None, config_drive
+        elif bool_like:
+            return None, bool_like
         else:
             cd_image_service, config_drive_id = \
                 glance.get_remote_image_service(context, config_drive)

nova/tests/compute/test_compute.py

@@ -8989,21 +8989,13 @@ def test_value_is_none(self):
         self.assertCheck((None, None), None)
         self.assertFalse(self.called['show'])
 
-    def test_value_is_bool_like_string(self):
-        self.assertCheck((None, 'True'), 'True')
-        self.assertCheck((None, 'yes'), 'yes')
-
     def test_bool_string_or_id(self):
-        # NOTE(sirp): '0' and '1' could be a bool value or an ID.  Since there
-        # are many other ways to specify bools (e.g. 't', 'f'), it's better to
-        # treat as an ID.
-        self.assertCheck((0, None), 0)
-        self.assertCheck((1, None), 1)
-        self.assertCheck(('0', None), '0')
-        self.assertCheck(('1', None), '1')
+        self.assertCheck((None, True), "true")
+        self.assertCheck((None, True), 1)
+        self.assertCheck((None, True), 't')
 
     def test_value_is_image_id(self):
-        self.assertCheck((2, None), 2)
+        self.assertCheck(("fake-uuid", None), "fake-uuid")
 
 
 class CheckRequestedImageTestCase(test.TestCase):