Install vim text editor

Manila service image has old "vi" that provides very narrow set of
functionality. So, install better text editor - "vim".

Change-Id: I06443c7c9a3585c65b58b20919eb63727ffbeb62
Closes-Bug: #1535807

elements/manila-ubuntu-core/post-install.d/50-update-vim-config

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
+    set -x
+fi
+set -eu
+set -o pipefail
+
+# Add useful config options for vim config
+vim_config="/etc/vim/vimrc"
+echo "set hls is" >> $vim_config
+echo "set tabstop=4" >> $vim_config
+echo "set shiftwidth=4" >> $vim_config
+echo "set expandtab" >> $vim_config
+echo "set nu" >> $vim_config
+echo "set background=dark" >> $vim_config
+echo "set cc=80" >> $vim_config

elements/manila-ubuntu-core/pre-install.d/00-install-required-packages

@@ -10,4 +10,10 @@ sudo sed -i -E "s/#\s(deb.+universe)$/\1/g" /etc/apt/sources.list
 
 apt-get update
 apt-get upgrade -y
-apt-get install python sudo openssh-server rpcbind -y
+apt-get install \
+    python \
+    sudo \
+    openssh-server \
+    rpcbind \
+    vim \
+    -y