update for name change to Neutron

Note: Nova and Horizon are not updated until those projects have
migrated.

Change-Id: I256ef20e7caadd9c96e6dd908c5d8b69ca5c4aeb
diff --git a/exercises/volumes.sh b/exercises/volumes.sh
index 7913641..f574bb3 100755
--- a/exercises/volumes.sh
+++ b/exercises/volumes.sh
@@ -30,9 +30,9 @@
 # Import configuration
 source $TOP_DIR/openrc
 
-# Import quantum functions if needed
-if is_service_enabled quantum; then
-    source $TOP_DIR/lib/quantum
+# Import neutron functions if needed
+if is_service_enabled neutron; then
+    source $TOP_DIR/lib/neutron
 fi
 
 # Import exercise configuration