Give the store tests' service manager holders the three verbs it now must serve (issue 332)

They named only the eight verbs from before issue 332 and were refused once the seat required
reset-failed, wanted-by and unlink-dangling.

internal/inventory/seats_test.go

@@ -202,14 +202,15 @@ func TestASeatsVerbGainsTheArgumentsTheBinaryNames(t *testing.T) {
 		t.Fatal("failed was not added to the row")
 	}
 	// The optional mark is not stored; the working set read from the rows takes it from the compiled seat,
-	// so today's holder, which does not serve failed, still holds the seat.
+	// so a holder that does not serve the optional failed still holds the seat.
 	catalogue.UseSeats(seats)
 	defer catalogue.UseSeats(catalogue.DefaultSeats())
 	live, _ := catalogue.SeatNamed(catalogue.ServiceManagerSeat)
 	holder := catalogue.Manifest{Module: "systemd", Version: "1", Claims: []catalogue.Claim{{Name: catalogue.ServiceManagerSeat,
-		Scope: catalogue.ScopeNode, Serves: []string{"units", "status", "start", "stop", "restart", "enable", "disable", "journal"}}}}
+		Scope: catalogue.ScopeNode, Serves: []string{"units", "status", "start", "stop", "restart", "enable", "disable", "journal",
+			"reset-failed", "wanted-by", "unlink-dangling"}}}}
 	if err := catalogue.CanHold(holder, live); err != nil {
-		t.Fatalf("the seat read from the store refuses today's holder: %v", err)
+		t.Fatalf("the seat read from the store refuses a holder without the optional failed: %v", err)
 	}
 	// Seeding again changes nothing more.
 	before := verbs["journal"]