use StringBuilder rather than StringBuffer

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-components/trunk@1370986 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/spring-registry-commons/src/main/java/org/apache/archiva/redback/components/registry/commons/CommonsConfigurationRegistry.java b/spring-registry-commons/src/main/java/org/apache/archiva/redback/components/registry/commons/CommonsConfigurationRegistry.java
index 41969af..d0d1e7f 100644
--- a/spring-registry-commons/src/main/java/org/apache/archiva/redback/components/registry/commons/CommonsConfigurationRegistry.java
+++ b/spring-registry-commons/src/main/java/org/apache/archiva/redback/components/registry/commons/CommonsConfigurationRegistry.java
@@ -98,7 +98,7 @@
 
     public String dump()
     {
-        StringBuffer buffer = new StringBuffer();
+        StringBuilder buffer = new StringBuilder();
         buffer.append( "Configuration Dump." );
         for ( Iterator i = configuration.getKeys(); i.hasNext(); )
         {