Documentation: Add e2e tests link from dev-readme

Change-Id: Ibaf8023c31b472c3ade4ea0bb0d3df5a74eab356
diff --git a/Documentation/dev-readme.txt b/Documentation/dev-readme.txt
index 99c8be1..031a6a0 100644
--- a/Documentation/dev-readme.txt
+++ b/Documentation/dev-readme.txt
@@ -60,6 +60,12 @@
 For instructions on running the acceptance tests with Bazel,
 see <<dev-bazel#tests,Running Unit Tests with Bazel>>.
 
+[[e2e]]
+=== End-to-end tests
+
+<<dev-e2e-tests#,This document>> describes how load test scenarios are
+implemented using link:https://gatling.io/[`Gatling`].
+
 
 == Local server