Add Birch.2 to Vagrantfiles

vagrant/release/devstack/Vagrantfile

@@ -82,6 +82,9 @@ openedx_releases = {
   "named-release/birch.1" => {
     :name => "birch-devstack-1", :file => "birch-1-devstack.box",
   },
+  "named-release/birch.2" => {
+    :name => "birch-devstack-2", :file => "birch-2-devstack.box",
+  },
 }
 openedx_releases.default = {
   :name => "lavash-devstack", :file => "20141118-lavash-devstack.box"

vagrant/release/fullstack/Vagrantfile

@@ -33,6 +33,9 @@ openedx_releases = {
   "named-release/birch.1" => {
     :name => "birch-fullstack-1", :file => "birch-1-fullstack.box",
   },
+  "named-release/birch.2" => {
+    :name => "birch-fullstack-2", :file => "birch-2-fullstack.box",
+  },
 }
 openedx_releases.default = {
   :name => "kifli-fullstack", :file => "20140826-kifli-fullstack.box"