Move test_job_auth_inheritance to test_v3

Move this into configuration files so that we can test the
functionality end-to-end rather than relying on internal APIs
which are frequently changing.

Change-Id: If1f75cf332732af31386e597b607e45253ecee1f
diff --git a/tests/fixtures/config/secret-inheritance/main.yaml b/tests/fixtures/config/secret-inheritance/main.yaml
new file mode 100644
index 0000000..208e274
--- /dev/null
+++ b/tests/fixtures/config/secret-inheritance/main.yaml
@@ -0,0 +1,8 @@
+- tenant:
+    name: tenant-one
+    source:
+      gerrit:
+        config-projects:
+          - common-config
+        untrusted-projects:
+          - org/project