Edits assert methods

Makes changes to
tests/ipmi/platform/test_intel_node_manager.py.

Replaces assertTrue(variable, {}) with
assertEqual({}, 'variable'), where
'variable' is temperature and power.

Change-Id: Idcd258bb6be4aebef5bcfc91cedb91cb14c69950

ceilometer/tests/ipmi/platform/test_intel_node_manager.py

@@ -75,10 +75,10 @@ class TestNonNodeManager(base.BaseTestCase):
         power = self.nm.read_power_all()
 
         # Non-Node Manager platform return empty data
-        self.assertTrue(power == {})
+        self.assertEqual({}, power)
 
     def test_read_temperature_all(self):
         temperature = self.nm.read_temperature_all()
 
         # Non-Node Manager platform return empty data
-        self.assertTrue(temperature == {})
+        self.assertEqual({}, temperature)