Update BulkIngestExample

Correct invalid return type from main method in BulkIngestExample.
diff --git a/src/main/java/org/apache/accumulo/examples/mapreduce/bulk/BulkIngestExample.java b/src/main/java/org/apache/accumulo/examples/mapreduce/bulk/BulkIngestExample.java
index d5b3aa1..6b27309 100644
--- a/src/main/java/org/apache/accumulo/examples/mapreduce/bulk/BulkIngestExample.java
+++ b/src/main/java/org/apache/accumulo/examples/mapreduce/bulk/BulkIngestExample.java
@@ -102,13 +102,13 @@
     }
   }
 
-  public static int main(String[] args) throws Exception {
+  public static void main(String[] args) throws Exception {
     ClientOpts opts = new ClientOpts();
     opts.parseArgs(BulkIngestExample.class.getName(), args);
     FileSystem fs = FileSystem.get(opts.getHadoopConfig());
 
     generateTestData(fs);
-    return ingestTestData(fs, opts);
+    ingestTestData(fs, opts);
   }
 
   private static void generateTestData(FileSystem fs) throws IOException {