Switch to Fedora-x86_64-20-20140618-sda

The heat-slow job using the Fedora-20 image as L2 guest, the
currently used version is affected by the heartbleed issue and
the Mb-Bios bug issue observed with emulation.

This version of the  Fedora cloud image uses the no_timer_check
kernel parameter, which solves the MP-Bios Bug issue.

The Image tested with ~3000 heat-slow job, without any issue.

Change-Id: I9ce9b7769c2d91e630b0362f2c2c6ac9066defbc
Closes-Bug: #1312199
Closes-Bug: #1297560
diff --git a/stackrc b/stackrc
index 840f3ac..f93dc92 100644
--- a/stackrc
+++ b/stackrc
@@ -354,7 +354,7 @@
 if [[ "$ENABLED_SERVICES" =~ 'h-api' ]]; then
     case "$VIRT_DRIVER" in
         libvirt|baremetal|ironic)
-            HEAT_CFN_IMAGE_URL=${HEAT_CFN_IMAGE_URL:-"https://dl.fedoraproject.org/pub/fedora/linux/releases/20/Images/x86_64/Fedora-x86_64-20-20131211.1-sda.qcow2"}
+            HEAT_CFN_IMAGE_URL=${HEAT_CFN_IMAGE_URL:-"http://dl.fedoraproject.org/pub/alt/openstack/20/x86_64/Fedora-x86_64-20-20140618-sda.qcow2"}
             IMAGE_URLS+=",$HEAT_CFN_IMAGE_URL"
             ;;
         *)
@@ -366,7 +366,10 @@
 PRECACHE_IMAGES=$(trueorfalse False $PRECACHE_IMAGES)
 if [[ "$PRECACHE_IMAGES" == "True" ]]; then
     # staging in update for nodepool
-    IMAGE_URLS+=",http://dl.fedoraproject.org/pub/alt/openstack/20/x86_64/Fedora-x86_64-20-20140618-sda.qcow2"
+    IMAGE_URL="http://dl.fedoraproject.org/pub/alt/openstack/20/x86_64/Fedora-x86_64-20-20140618-sda.qcow2"
+    if ! [[ "$IMAGE_URLS"  =~ "$IMAGE_URL" ]]; then
+        IMAGE_URLS+=",$IMAGE_URL"
+    fi
 fi
 
 # 10Gb default volume backing file size