Update Vagrantfile for Multi-OS testing

Change-Id: Ic9dc3e3755f36db63298de3348fd6ff3c3a60a91

Vagrantfile

@@ -1,13 +1,46 @@
 Vagrant.configure(2) do |config|
-  config.vm.box = "ubuntu/trusty64"
-  config.vm.provider "virtualbox" do |v|
-    v.memory = 2048
-    v.cpus = 2
+
+  config.vm.define "ubuntu1404" do |trusty|
+    trusty.vm.box = "ubuntu/trusty64"
+
+    trusty.vm.provider "virtualbox" do |v|
+      v.memory = 2048
+      v.cpus = 2
+    end
+
+    trusty.vm.provision "shell", inline: <<-SHELL
+      sudo su -
+      cd /vagrant
+      apt-get update
+      ./run_tests.sh
+    SHELL
   end
-  config.vm.provision "shell", inline: <<-SHELL
-    sudo su -
-    cd /vagrant
-    apt-get update
-    ./run_tests.sh
-  SHELL
-end
+
+  config.vm.define "ubuntu1604" do |xenial|
+    xenial.vm.box = "ubuntu/xenial64"
+    xenial.vm.provider "virtualbox" do |v|
+      v.memory = 2048
+      v.cpus = 2
+    end
+    xenial.vm.provision "shell", inline: <<-SHELL
+      sudo su -
+      cd /vagrant
+      apt-get update
+      ./run_tests.sh
+    SHELL
+  end
+
+  config.vm.define "centos7" do |centos7|
+    centos7.vm.box = "centos/7"
+    centos7.vm.provider "virtualbox" do |v|
+      v.memory = 2048
+      v.cpus = 2
+    end
+    centos7.vm.provision "shell", inline: <<-SHELL
+      sudo su -
+      cd /home/vagrant/sync
+      ./run_tests.sh
+    SHELL
+  end
+
+end