replace use of cirros 0.3.0 with 0.3.1

cirros 0.3.1 images have several significant improvements over 0.3.0, including:
 * newer kernel (3.2.0-25.40)
 * support for more filesystems (vfat, iso9660)
 * support for configdrive (config-drive-v2) as a datasource
 * acpi reboot/shutdown
 * curl with https support (previously there was no way to get https urls)

Change-Id: Idd7bef0cebb941f77d1cead9dc990fa0b03ff46b
diff --git a/lib/tempest b/lib/tempest
index e43f6d7..2ffd774 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -48,7 +48,7 @@
 BUILD_TIMEOUT=400
 
 
-BOTO_MATERIALS_PATH="$FILES/images/s3-materials/cirros-0.3.0"
+BOTO_MATERIALS_PATH="$FILES/images/s3-materials/cirros-0.3.1"
 
 # Entry Points
 # ------------
@@ -273,8 +273,8 @@
 
 # init_tempest() - Initialize ec2 images
 function init_tempest() {
-    local base_image_name=cirros-0.3.0-x86_64
-    # /opt/stack/devstack/files/images/cirros-0.3.0-x86_64-uec
+    local base_image_name=cirros-0.3.1-x86_64
+    # /opt/stack/devstack/files/images/cirros-0.3.1-x86_64-uec
     local image_dir="$FILES/images/${base_image_name}-uec"
     local kernel="$image_dir/${base_image_name}-vmlinuz"
     local ramdisk="$image_dir/${base_image_name}-initrd"
diff --git a/stack.sh b/stack.sh
index 331743f..62f533d 100755
--- a/stack.sh
+++ b/stack.sh
@@ -1215,8 +1215,9 @@
 # Upload an image to glance.
 #
 # The default image is cirros, a small testing image which lets you login as **root**
-# cirros also uses ``cloud-init``, supporting login via keypair and sending scripts as
-# userdata.  See https://help.ubuntu.com/community/CloudInit for more on cloud-init
+# cirros has a ``cloud-init`` analog supporting login via keypair and sending
+# scripts as userdata.
+# See https://help.ubuntu.com/community/CloudInit for more on cloud-init
 #
 # Override ``IMAGE_URLS`` with a comma-separated list of UEC images.
 #  * **oneiric**: http://uec-images.ubuntu.com/oneiric/current/oneiric-server-cloudimg-amd64.tar.gz
diff --git a/stackrc b/stackrc
index 91f4e2b..2ee7d18 100644
--- a/stackrc
+++ b/stackrc
@@ -167,12 +167,12 @@
 #    glance as a disk image.  If it ends in .gz, it is uncompressed first.
 #    example:
 #      http://cloud-images.ubuntu.com/releases/oneiric/release/ubuntu-11.10-server-cloudimg-armel-disk1.img
-#      http://launchpad.net/cirros/trunk/0.3.0/+download/cirros-0.3.0-x86_64-rootfs.img.gz
+#      http://download.cirros-cloud.net/0.3.1/cirros-0.3.1-x86_64-rootfs.img.gz
 #  * OpenVZ image:
 #    OpenVZ uses its own format of image, and does not support UEC style images
 
 #IMAGE_URLS="http://smoser.brickies.net/ubuntu/ttylinux-uec/ttylinux-uec-amd64-11.2_2.6.35-15_1.tar.gz" # old ttylinux-uec image
-#IMAGE_URLS="http://launchpad.net/cirros/trunk/0.3.0/+download/cirros-0.3.0-x86_64-disk.img" # cirros full disk image
+#IMAGE_URLS="http://download.cirros-cloud.net/0.3.1/cirros-0.3.1-x86_64-disk.img" # cirros full disk image
 
 # Set default image based on ``VIRT_DRIVER`` and ``LIBVIRT_TYPE``, either of
 # which may be set in ``localrc``.  Also allow ``DEFAULT_IMAGE_NAME`` and
@@ -184,16 +184,16 @@
     libvirt)
         case "$LIBVIRT_TYPE" in
             lxc) # the cirros root disk in the uec tarball is empty, so it will not work for lxc
-                DEFAULT_IMAGE_NAME=${DEFAULT_IMAGE_NAME:-cirros-0.3.0-x86_64-rootfs}
-                IMAGE_URLS=${IMAGE_URLS:-"http://launchpad.net/cirros/trunk/0.3.0/+download/cirros-0.3.0-x86_64-rootfs.img.gz"};;
+                DEFAULT_IMAGE_NAME=${DEFAULT_IMAGE_NAME:-cirros-0.3.1-x86_64-rootfs}
+                IMAGE_URLS=${IMAGE_URLS:-"http://download.cirros-cloud.net/0.3.1/cirros-0.3.1-x86_64-rootfs.img.gz"};;
             *) # otherwise, use the uec style image (with kernel, ramdisk, disk)
-                DEFAULT_IMAGE_NAME=${DEFAULT_IMAGE_NAME:-cirros-0.3.0-x86_64-uec}
-                IMAGE_URLS=${IMAGE_URLS:-"http://launchpad.net/cirros/trunk/0.3.0/+download/cirros-0.3.0-x86_64-uec.tar.gz"};;
+                DEFAULT_IMAGE_NAME=${DEFAULT_IMAGE_NAME:-cirros-0.3.1-x86_64-uec}
+                IMAGE_URLS=${IMAGE_URLS:-"http://download.cirros-cloud.net/0.3.1/cirros-0.3.1-x86_64-uec.tar.gz"};;
         esac
         ;;
     *) # otherwise, use the uec style image (with kernel, ramdisk, disk)
-        DEFAULT_IMAGE_NAME=${DEFAULT_IMAGE_NAME:-cirros-0.3.0-x86_64-uec}
-        IMAGE_URLS=${IMAGE_URLS:-"http://launchpad.net/cirros/trunk/0.3.0/+download/cirros-0.3.0-x86_64-uec.tar.gz"};;
+        DEFAULT_IMAGE_NAME=${DEFAULT_IMAGE_NAME:-cirros-0.3.1-x86_64-uec}
+        IMAGE_URLS=${IMAGE_URLS:-"http://download.cirros-cloud.net/0.3.1/cirros-0.3.1-x86_64-uec.tar.gz"};;
 esac
 
 # 5Gb default volume backing file size