i3status-rust: name the pacman-contrib package apart from the update script, and expect it in the test (issue 628)

The package took the id `updates`, which the update script already holds, so the node-engine refused two resources with one identity.

modules/i3status-rust/cmd/i3status-rust-tools/manifest_test.go

@@ -23,7 +23,8 @@ func TestItClaimsTheBarSeatAndRequiresTheXDisplay(t *testing.T) {
 	if !reflect.DeepEqual(m.Requires, []string{"x11-display"}) {
 		t.Fatalf("requires: %v", m.Requires)
 	}
-	if present, absent := m.packages(); !reflect.DeepEqual(present, []string{"i3status-rust"}) || absent != nil {
+	// pacman-contrib for the update block's checkupdates, declared here though the pacman module declares it too (ADR 0303).
+	if present, absent := m.packages(); !reflect.DeepEqual(present, []string{"i3status-rust", "pacman-contrib"}) || absent != nil {
 		t.Fatalf("packages: %v, absent %v", present, absent)
 	}
 }

modules/i3status-rust/module.json

@@ -36,7 +36,7 @@
       "package": "i3status-rust"
     },
     {
-      "id": "updates",
+      "id": "checkupdates",
       "type": "package",
       "package": "pacman-contrib"
     },