Fixed wrongly used assertEqual method

In several places, assertEqual is used the following way:
  assertEqual(observed, expected)
However, the correct way to use assertEqual is:
  assertEqual(expected, observed)

Change-Id: I5a7442f4adf98bf7bc73cef1d17d20da39d9a7f8
Closes-Bug: #1551861

watcher_tempest_plugin/tests/api/admin/test_audit_template.py

@@ -121,7 +121,7 @@ class TestAuditTemplate(base.BaseInfraOptimTest):
         _, body = self.client.list_audit_templates(limit=3)
 
         next_marker = body['audit_templates'][-1]['uuid']
-        self.assertEqual(len(body['audit_templates']), 3)
+        self.assertEqual(3, len(body['audit_templates']))
         self.assertIn(next_marker, body['next'])
 
     @test.attr(type='smoke')