tests: explicitly specify services to be sourced from self

See previous commit

clanServices/zerotier/tests/eval-tests.nix

@@ -22,6 +22,7 @@ let
     inventory.instances = {
       zerotier = {
         module.name = "zerotier";
+        module.input = "self";
 
         roles.peer.tags.all = { };
         roles.moon.machines.sara.settings.stableEndpoints = [ "10.0.0.3/9993" ];

clanServices/zerotier/tests/vm/default.nix

@@ -12,6 +12,7 @@
       instances = {
         "zerotier" = {
           module.name = "zerotier";
+          module.input = "self";
 
           roles.peer.tags.all = { };
           roles.controller.machines.bam = { };