Adding Vagrantfile for local developer testing

This Vagrantfile attempts to replicate the gate check
testing to the extent possible to allow developers to
run all tests locally in a Vagrant environment prior
to submitting changes for review.

Memory and CPU config is adjusted as Galera cannot
install/run successfully on the default config.

Change-Id: I1289d576934244edf0176ec4e25a11fc75738c0f

.gitignore

@@ -60,3 +60,6 @@ releasenotes/build
 
 # Test temp files
 tests/plugins
+
+# Vagrant testing artifacts
+.vagrant

Vagrantfile

@@ -0,0 +1,13 @@
+Vagrant.configure(2) do |config|
+  config.vm.box = "ubuntu/trusty64"
+  config.vm.provider "virtualbox" do |v|
+    v.memory = 2048
+    v.cpus = 2
+  end
+  config.vm.provision "shell", inline: <<-SHELL
+    sudo su -
+    cd /vagrant
+    apt-get update
+    ./run_tests.sh
+  SHELL
+end