Fix ONOS-4503 - allow ONOS to run in offline mode with no internet connection

Change-Id: I7122800e2c485743313c5d963bc75f8dd0292452
diff --git a/.buckconfig b/.buckconfig
index bb8acbf..7c17b3f 100644
--- a/.buckconfig
+++ b/.buckconfig
@@ -16,7 +16,7 @@
   in_build = true
 
 [maven_repositories]
-  central = https://repo.maven.apache.org/maven2
+  central = https://repo1.maven.org/maven2
 
 [project]
   ide = intellij