Add functional tests for volume set size

Change-Id: Ie369c6366e1d0632ab1892fd019f5b12528c195b

Author: TerryHowe

functional/tests/volume/v1/test_volume.py

@@ -69,3 +69,10 @@ def test_volume_set(self):
         opts = self.get_show_opts(["display_description", "display_name"])
         raw_output = self.openstack('volume show ' + self.NAME + opts)
         self.assertEqual("RAMAC\n" + self.NAME + "\n", raw_output)
+
+    def test_volume_set_size(self):
+        raw_output = self.openstack(
+            'volume set --size 2 ' + self.NAME)
+        opts = self.get_show_opts(["display_name", "size"])
+        raw_output = self.openstack('volume show ' + self.NAME + opts)
+        self.assertEqual(self.NAME + "\n2\n", raw_output)