Test derivation options with content-addressing too

Now, both the unit and functional tests relating to derivation options
are tested both ways -- with input addressing and content-addressing
derivations.

tests/functional/derivation/advanced-attributes-defaults.nix

@@ -1,6 +1,24 @@
-derivation {
-  name = "advanced-attributes-defaults";
+{ contentAddress }:
+
+let
+  caArgs =
+    if contentAddress then
+      {
+        __contentAddressed = true;
+        outputHashMode = "recursive";
+        outputHashAlgo = "sha256";
+      }
+    else
+      { };
+
+  derivation' = args: derivation (caArgs // args);
+
   system = "my-system";
+
+in
+derivation' {
+  inherit system;
+  name = "advanced-attributes-defaults";
   builder = "/bin/bash";
   args = [
     "-c"