chore(vagrant): bump memory to 4096

Author: Gabriel Monroy

Vagrantfile

@@ -12,7 +12,7 @@ Vagrant.configure("2") do |config|
   end
 
   config.vm.provider :virtualbox do |vb, override|
-    vb.customize ["modifyvm", :id, "--memory", "2048"]
+    vb.customize ["modifyvm", :id, "--memory", "4096"]
     # Fix docker not being able to resolve private registry in VirtualBox
     vb.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
     vb.customize ["modifyvm", :id, "--natdnsproxy1", "on"]
@@ -38,6 +38,9 @@ Vagrant.configure("2") do |config|
     # workaround missing /etc/environment
     config.vm.provision :shell, :inline => "touch /etc/environment", :privileged => true
 
+	# disable update-engine to prevent reboots
+	config.vm.provision :shell, :inline => "systemctl disable update-engine && systemctl mask update-engine", :privileged => true
+
     # user-data bootstrapping
     config.vm.provision :file, :source => "contrib/coreos/user-data", :destination => "/tmp/user-data"
     config.vm.provision :shell, :inline => "mkdir -p /var/lib/coreos-vagrant && mv /tmp/user-data /var/lib/coreos-vagrant", :privileged => true