Bump to Lucene 5.2.1

Luca Milanesio

2015-09-09 e618eb051246e7941dc2964a5038587c9d45d1d2

 src/test/java/com/gitblit/tests/mock/MemorySettings.java

@@ -48,6 +48,11 @@
   }

   @Override
   public boolean saveSettings() {
      return false;
   }

   @Override
   public boolean saveSettings(Map<String, String> updatedSettings) {
      return false;
   }