Set the rabbit_durable_queues to match local consumers

Due to a problematic bug in Glance (https://bugs.launchpad.net/glance/+bug/1074132),
I was unable to get stack.sh to complete successfully. The workaround on the
Glance bug was to set the rabbit_durable_queues value to match the setting
of the local Rabbit consumers and exchanges.

This patch merely looks for any consumer or exchange that
is durable and ensures that the default durable_rabbit_queues
config option of False is set to True in that case.

Change-Id: Ia5a165a5a06d11d1fe6492ca32139972d49d3a1e

lib/glance

@@ -70,6 +70,13 @@ function configure_glanceclient() {
     setup_develop $GLANCECLIENT_DIR
 }
 
+# durable_glance_queues() - Determine if RabbitMQ queues are durable or not
+function durable_glance_queues() {
+    test `rabbitmqctl list_queues name durable | grep true | wc -l` -gt 0 && return 0
+    test `rabbitmqctl list_exchanges name durable | grep true | wc -l` -gt 0 && return 0
+    return 1
+}
+
 # configure_glance() - Set config files, create data dirs, etc
 function configure_glance() {
     setup_develop $GLANCE_DIR
@@ -120,6 +127,12 @@ function configure_glance() {
         iniset $GLANCE_API_CONF DEFAULT notifier_strategy rabbit
         iniset $GLANCE_API_CONF DEFAULT rabbit_host $RABBIT_HOST
         iniset $GLANCE_API_CONF DEFAULT rabbit_password $RABBIT_PASSWORD
+        if [[ durable_glance_queues -eq 0 ]]; then
+            # This gets around https://bugs.launchpad.net/glance/+bug/1074132
+            # that results in a g-api server becoming unresponsive during
+            # startup...
+            iniset $GLANCE_API_CONF DEFAULT rabbit_durable_queues True
+        fi
     fi
     if [[ "$KEYSTONE_TOKEN_FORMAT" == "PKI" ]]; then
         iniset $GLANCE_API_CONF keystone_authtoken signing_dir $GLANCE_AUTH_CACHE_DIR/api