Update vagrant files with rc3 images.

vagrant/release/devstack/Vagrantfile

@@ -90,9 +90,12 @@ openedx_releases = {
   "named-release/cypress.rc2" => {
     :name => "cypress-devstack-rc2", :file => "20150717-cypress-devstack-rc2.box",
   },
+  "named-release/cypress.rc3" => {
+    :name => "cypress-devstack-rc3", :file => "20150724-cypress-devstack-rc3.box",
+  },
 }
 openedx_releases.default = {
-  :name => "lavash-devstack", :file => "20141118-lavash-devstack.box"
+  :name => "cypress-devstack-rc3", :file => "20150724-cypress-devstack-rc3.box",
 }
 openedx_releases_vmware = {
   "named-release/birch" => {

vagrant/release/fullstack/Vagrantfile

@@ -36,9 +36,12 @@ openedx_releases = {
   "named-release/birch.2" => {
     :name => "birch-fullstack-2", :file => "birch-2-fullstack.box",
   },
+  "named-release/cypress.rc3" => {
+    :name => "cypress-fullstack-rc3", :file => "20150724-cypress-fullstack-rc3.box",
+  },
 }
 openedx_releases.default = {
-  :name => "kifli-fullstack", :file => "20140826-kifli-fullstack.box"
+  :name => "cypress-fullstack-rc3", :file => "20150724-cypress-fullstack-rc3.box",
 }
 openedx_releases_vmware = {
   "named-release/birch" => {