Sync STANDARDS with placement/nova rc_fields

Two new standard resource classes were added in the time between when
os-resource-classes was first created and now. This change adds the
missing classes and adds a rather tedious sanity check to make sure
that tests are updated when adding new classes.

Change-Id: I00158c3167430e180040c71cd6e2d646f64372fa

os_resource_classes/__init__.py

@@ -53,6 +53,12 @@ STANDARDS = [
     'IPV4_ADDRESS',
     'VGPU',
     'VGPU_DISPLAY_HEAD',
+    # Standard resource class for network bandwidth egress measured in
+    # kilobits per second.
+    'NET_BW_EGR_KILOBIT_PER_SEC',
+    # Standard resource class for network bandwidth ingress measured in
+    # kilobits per second.
+    'NET_BW_IGR_KILOBIT_PER_SEC',
 ]
 
 # Namespace used for custom resource classes

os_resource_classes/tests/test_os_resource_classes.py

@@ -30,3 +30,21 @@ class TestOs_resource_classes(base.TestCase):
     def test_id_mapping_symbols(self):
         self.assertEqual(rc.VCPU, rc.STANDARDS[0])
         self.assertEqual(rc.DISK_GB, rc.STANDARDS[2])
+
+    def test_standards_tail(self):
+        """A sanity check that developers are paying attention.
+
+        When one or more standard classes are added, change the expected
+        last class to the last one added and the length to the new length
+        of rc.STANDARDS.
+
+        If you arrive here because you've run the tests and they've failed
+        it's possible you've added some standard classes and not thought
+        about their order. You _must_ add new standard classs at the end
+        of the STANDARDS list, otherwise database ids will get confused
+        in the placement service.
+        """
+        expected_last_class = rc.NET_BW_IGR_KILOBIT_PER_SEC
+        expected_length = 14
+        self.assertEqual(expected_last_class, rc.STANDARDS[-1])
+        self.assertEqual(expected_length, len(rc.STANDARDS))