Use oslo-messaging-zmq-receiver to start zeromq receiver

The project-specific receiver command nova-rpc-zmq-receiver
has been replaced with oslo-messaging-zmq-receiver.

We need to update devstack code accordingly.

Change-Id: I7696c649fa818ecb523b698ea4a23f70da60147d
Closes-Bug: 1279739
diff --git a/lib/oslo b/lib/oslo
index dc6b550..1b47e66 100644
--- a/lib/oslo
+++ b/lib/oslo
@@ -30,6 +30,9 @@
 STEVEDORE_DIR=$DEST/stevedore
 TASKFLOW_DIR=$DEST/taskflow
 
+# Support entry points installation of console scripts
+OSLO_BIN_DIR=$(get_python_exec_prefix)
+
 # Entry Points
 # ------------
 
diff --git a/stack.sh b/stack.sh
index bd99b5b..f1ffb8a 100755
--- a/stack.sh
+++ b/stack.sh
@@ -1167,7 +1167,7 @@
 
 if is_service_enabled zeromq; then
     echo_summary "Starting zermomq receiver"
-    screen_it zeromq "cd $NOVA_DIR && $NOVA_BIN_DIR/nova-rpc-zmq-receiver"
+    screen_it zeromq "cd $NOVA_DIR && $OSLO_BIN_DIR/oslo-messaging-zmq-receiver"
 fi
 
 # Launch the nova-api and wait for it to answer before continuing