Installer: Implement multi network selector

Change-Id: I52227a0f0e964ac48cb378ead077fad941c3315c
diff --git a/core/installer/app_manager.go b/core/installer/app_manager.go
index 2cc29ed..dda7f8b 100644
--- a/core/installer/app_manager.go
+++ b/core/installer/app_manager.go
@@ -897,6 +897,8 @@
 		return ret
 	case KindNetwork:
 		return []string{}
+	case KindMultiNetwork:
+		return []string{}
 	case KindAuth:
 		return []string{}
 	case KindSSHKey: