Add a test for custom compute flavors for amphorae

Add a test in scenario.v2.test_load_balancer, it creates a custom nova
flavor and creates a load-balancer that uses this flavor for the amphora
compute.

Change-Id: I2b5612bc28af8e64b3c1952662d1188a26119331
diff --git a/releasenotes/notes/add-load-balancer-with-custom-flavor-9a27a1d4142a84d3.yaml b/releasenotes/notes/add-load-balancer-with-custom-flavor-9a27a1d4142a84d3.yaml
new file mode 100644
index 0000000..5d9837c
--- /dev/null
+++ b/releasenotes/notes/add-load-balancer-with-custom-flavor-9a27a1d4142a84d3.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Add a load-balancer scenario test with a custom amphora compute flavor
+    (using Octavia flavor and flavor profile features).