appview: fix non-empty spindle removal

Signed-off-by: oppiliappan <[e-mail]>

appview/ingester.go

···
 			i.Enforcer.E.LoadPolicy()
 		}()
 
+		// remove spindle members first
+		err = db.RemoveSpindleMember(
+			tx,
+			db.FilterEq("owner", did),
+			db.FilterEq("instance", instance),
+		)
+		if err != nil {
+			return err
+		}
+
 		err = db.DeleteSpindle(
 			tx,
 			db.FilterEq("owner", did),

appview/spindles/spindles.go

···
 		s.Enforcer.E.LoadPolicy()
 	}()
 
+	// remove spindle members first
+	err = db.RemoveSpindleMember(
+		tx,
+		db.FilterEq("did", user.Did),
+		db.FilterEq("instance", instance),
+	)
+	if err != nil {
+		l.Error("failed to remove spindle members", "err", err)
+		fail()
+		return
+	}
+
 	err = db.DeleteSpindle(
 		tx,
 		db.FilterEq("owner", user.Did),