Turning @Output required to false

By default all output is assigned to stdout if a -o is not provided. Technically this makes @Output a not required parameter, and the documentation is misleading because it's reading from the annotation.
GSA-820 #resolve

public/java/src/org/broadinstitute/sting/commandline/Output.java

@@ -64,7 +64,7 @@ public @interface Output {
      * fail if the type can't be populated.
      * @return True if the argument is required.  False otherwise.
      */
-    boolean required() default true;
+    boolean required() default false;
 
     /**
      * Should this command-line argument be exclusive of others.  Should be