DL-192: year needs updating in NOTICE

The year was 2016. but we are going to release at 2017. so updating the files to 2017.

Author: Sijie Guo <sijie@apache.org>

Reviewers: Leigh Stewart <lstewart@apache.org>

Closes #119 from sijie/sijie/fix_notice_file
diff --git a/NOTICE b/NOTICE
index 5245e00..c9dfcda 100644
--- a/NOTICE
+++ b/NOTICE
@@ -1,5 +1,5 @@
 Apache DistributedLog
-Copyright 2016 The Apache Software Foundation
+Copyright 2017 The Apache Software Foundation
 
 Apache DistributedLog is currently undergoing Incubation at the Apache
 Software Foundation.
@@ -9,4 +9,4 @@
 ===============================================================================
 
 Portions of this software were developed by Twitter.
-Copyright Twitter, 2016
+Copyright Twitter, 2017