Alter config format to lists of dictionaries

Rather than the previous dictionary of lists.

Change-Id: I0f8ffba15da489da097b14388699685f22b0579f
diff --git a/tests/fixtures/config/project-template/main.yaml b/tests/fixtures/config/project-template/main.yaml
index c89fdfa..25dea57 100644
--- a/tests/fixtures/config/project-template/main.yaml
+++ b/tests/fixtures/config/project-template/main.yaml
@@ -1,4 +1,4 @@
-tenants:
-  - name: tenant-one
+- tenant:
+    name: tenant-one
     include:
       - common.yaml