DodoApp: Support env aliases

Change-Id: I7567935df8615c03089cb27d46852c0fb8ea5877
diff --git a/core/installer/app_test.go b/core/installer/app_test.go
index 4238ff5..7a7bf7a 100644
--- a/core/installer/app_test.go
+++ b/core/installer/app_test.go
@@ -465,7 +465,13 @@
 		enabled: false
 	}
     source: repository: "ssh://foo.bar"
-}]`
+}]
+
+mongodb: [{
+  name: "db"
+  size: "10Gi"
+}]
+`
 
 var dodoAppDevEnabledCue = `
 service: [{