Merge pull request #176 from KVM-VMI/vagrant/fix_grub

vagrant: update box to fix grub-pc dpkg issue

vagrant/Vagrantfile

@@ -1,8 +1,8 @@
 require 'rubygems'
 
 Vagrant.configure(2) do |config|
-    config.vm.box = "generic/debian10"
-    config.vm.box_version = "4.2.8"
+    config.vm.box = "generic/debian12"
+    config.vm.box_version = "4.3.12"
     config.vm.define "kvmi"
 
     # configuration
@@ -114,7 +114,7 @@ Vagrant.configure(2) do |config|
     # set stdout_callback = yaml to improve error output
     # note: problem with \1yaml -> \x01yaml in ansible.cfg
     config.vm.provision "shell",
-        inline: "apt-get install -y ansible && sed -i -E 's/^#?(stdout_callback\s*=\s*).*$/stdout_callback = yaml/' /etc/ansible/ansible.cfg"
+        inline: "apt-get install -y ansible && mkdir -p /etc/ansible && echo -e '[defaults]\nstdout_callback = yaml' > /etc/ansible/ansible.cfg"
 
     config.vm.provision "ansible_local" do |ansible|
         # debug