make sure .get() also updates _info

Having the _info get out of sync with the actual attributes is kind of a
trap for the unwary. _info is used in preference to the attributes in
many places, and letting it get out of sync means that the method of
retrieval (get() vs. list()) influences the result.

Change-Id: I9d9bf086fa790b811c520b2fa317f95cb1921805

novaclient/base.py

@@ -313,6 +313,7 @@ class Resource(object):
         for (k, v) in info.iteritems():
             try:
                 setattr(self, k, v)
+                self._info[k] = v
             except AttributeError:
                 # In this case we already defined the attribute on the class
                 pass

tests/v1_1/test_servers.py

@@ -32,6 +32,13 @@ class ServersTest(utils.TestCase):
         self.assertEqual(s.id, 1234)
         self.assertEqual(s.status, 'BUILD')
 
+    def test_get_server_promote_details(self):
+        s1 = cs.servers.list(detailed=False)[0]
+        s2 = cs.servers.list(detailed=True)[0]
+        self.assertNotEquals(s1._info, s2._info)
+        s1.get()
+        self.assertEquals(s1._info, s2._info)
+
     def test_create_server(self):
         s = cs.servers.create(
             name="My server",