Rename ivar _random -> random.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1462765 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/test/java/org/apache/commons/codec/binary/Base64Test.java

@@ -41,13 +41,13 @@
  */
 public class Base64Test {
 
-    private final Random _random = new Random();
+    private final Random random = new Random();
 
     /**
-     * @return Returns the _random.
+     * @return Returns the random.
      */
     public Random getRandom() {
-        return this._random;
+        return this.random;
     }
 
     /**