TT#61954 Update copyright years

Change-Id: I60d0e487339feeebee031faf3c4f6ffb2e77b21d

debian/copyright

@@ -3,17 +3,13 @@ Upstream-Name: ngcp-asterisk-voicemail
 Source: https://github.com/sipwise/asterisk-voicemail.git
 
 Files: *
-Copyright: 2013-2014 Sipwise GmbH, Austria
+Copyright: 2013-2019 Sipwise GmbH, Austria
 License: GPL-2
 
 Files: apps/app_voicemail.c
 Copyright: 1999-2015, Digium, Inc
 License: GPL-2
 
-Files: debian/*
-Copyright: 2015 Sipwise Development Team <support@sipwise.com>
-License: GPL-2
-
 License: GPL-2
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by