Fix repositories order

Repositories are attempted in order listed. This change optimize the
order so central repos are attempting before custom ones.

build.gradle

@@ -1,8 +1,8 @@
 /*
  * mxisd - Matrix Identity Server Daemon
- * Copyright (C) 2017 Maxime Dor
+ * Copyright (C) 2017 Kamax Sarl
  *
- * https://max.kamax.io/
+ * https://www.kamax.io/
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as
@@ -65,9 +65,9 @@ buildscript {
 }
 
 repositories {
+    mavenCentral()
     maven { url "https://kamax.io/maven/releases/" }
     maven { url "https://kamax.io/maven/snapshots/" }
-    mavenCentral()
 }
 
 dependencies {