Bring release Vagrantfiles up to date with master

vagrant/release/devstack/Vagrantfile

@@ -64,6 +64,21 @@ openedx_releases = {
   "aspen.1" => {
     :name => "aspen-devstack-1", :file => "20141028-aspen-devstack-1.box",
   },
+  "named-release/aspen" => {
+    :name => "aspen-devstack-1", :file => "20141028-aspen-devstack-1.box",
+  },
+  "named-release/birch.rc1" => {
+    :name => "birch-devstack-rc1", :file => "20150203-birch-devstack-rc1.box",
+  },
+  "named-release/birch.rc2" => {
+    :name => "birch-devstack-rc2", :file => "20150211-birch-devstack-rc2.box",
+  },
+  "named-release/birch.rc3" => {
+    :name => "birch-devstack-rc3", :file => "20150213-birch-devstack-rc3.box",
+  },
+  "named-release/birch" => {
+    :name => "birch-devstack", :file => "20150224-birch-devstack.box",
+  },
 }
 openedx_releases.default = {
   :name => "lavash-devstack", :file => "20141118-lavash-devstack.box"

vagrant/release/fullstack/Vagrantfile

@@ -15,6 +15,21 @@ openedx_releases = {
   "aspen.1" => {
     :name => "aspen-fullstack-1", :file => "20141028-aspen-fullstack-1.box",
   },
+  "named-release/aspen" => {
+    :name => "aspen-fullstack-1", :file => "20141028-aspen-fullstack-1.box",
+  },
+  "named-release/birch.rc1" => {
+    :name => "birch-fullstack-rc1", :file => "20150204-birch-fullstack-rc1.box"
+  },
+  "named-release/birch.rc2" => {
+    :name => "birch-fullstack-rc2", :file => "20150211-birch-fullstack-rc2.box"
+  },
+  "named-release/birch.rc3" => {
+    :name => "birch-fullstack-rc3", :file => "20150213-birch-fullstack-rc3.box"
+  },
+  "named-release/birch" => {
+    :name => "birch-fullstack", :file => "20150224-birch-fullstack.box",
+  },
 }
 openedx_releases.default = {
   :name => "kifli-fullstack", :file => "20140826-kifli-fullstack.box"