Install lsof

Change-Id: I8cf00807d6adf86b60b4c0ba3ea1040851866224
diff --git a/ubuntu-16.04/scripts/base.sh b/ubuntu-16.04/scripts/base.sh
index 1bee4b7..9b361b7 100644
--- a/ubuntu-16.04/scripts/base.sh
+++ b/ubuntu-16.04/scripts/base.sh
@@ -6,7 +6,7 @@
 apt-get update
 
 # Useful tools
-apt-get -y install curl wget tmux vim-nox byobu iputils-ping traceroute htop tree
+apt-get -y install curl wget tmux vim-nox byobu iputils-ping traceroute htop tree lsof
 
 # Add apt-mk repository
 echo "deb [arch=amd64] http://apt-mk.mirantis.com/xenial/ nightly salt" > /etc/apt/sources.list.d/mcp_salt.list