env-manager: log and reject requests

Someone is trying to periodically create new envs.

Change-Id: I45ca8682213bdc8f19b8f98fb130af442cc6380b
diff --git a/core/installer/cmd/env_manager.go b/core/installer/cmd/env_manager.go
index 483211e..1989fd2 100644
--- a/core/installer/cmd/env_manager.go
+++ b/core/installer/cmd/env_manager.go
@@ -95,6 +95,7 @@
 		httpClient,
 		dns.NewClient(),
 		tasks.NewTaskMap(),
+		false,
 	)
 	log.Printf("Starting server\n")
 	s.Start()