Fix import module in check_local_endpoint.py

This was introduced by e30fb97177.

Change-Id: I8d9a5d6c0d042bfc84c8854ae71f625925894da9
diff --git a/collectd/files/plugin/check_local_endpoint.py b/collectd/files/plugin/check_local_endpoint.py
index e01715f..d7c2f84 100644
--- a/collectd/files/plugin/check_local_endpoint.py
+++ b/collectd/files/plugin/check_local_endpoint.py
@@ -15,7 +15,7 @@
 
 import collectd
 import collectd_base as base
-import http_check
+import collectd_http_check as http_check
 
 
 NAME = 'check_local_endpoint'