Adding X11 forwarding and wireshark to the vagrantfile

Change-Id: I831401c41890d162558a1b1521e10ff6209eeb6e
diff --git a/trellis/Vagrantfile b/trellis/Vagrantfile
index c58907d..a46672e 100644
--- a/trellis/Vagrantfile
+++ b/trellis/Vagrantfile
@@ -5,11 +5,14 @@
   config.vm.box = "ubuntu/xenial64"
   config.vm.box_version = "20171221.0.0"
   config.vm.hostname = 'trellis-example'
+  config.ssh.forward_agent = true
+  config.ssh.forward_x11 = true
 
   config.vm.provision "shell", privileged: false, inline: <<-SHELL
     set -e -x -u
     sudo apt-get update
     sudo apt-get install -y gawk texinfo python-pip build-essential iptables automake autoconf libtool mininet isc-dhcp-server
+    sudo DEBIAN_FRONTEND=noninteractive apt-get -yq install wireshark
     sudo pip install -U pip
     sudo pip install ipaddress
     git clone -b onos-1.11 https://gerrit.opencord.org/quagga