Install Ironic client

Since python-ironicclient was published to github it's
reasonable to include it to the default Ironic set up.

Change-Id: Id1d0209959a3b482977b5e710c0885c714ad7e10
diff --git a/stack.sh b/stack.sh
index 14ec023..2501cd0 100755
--- a/stack.sh
+++ b/stack.sh
@@ -722,6 +722,7 @@
 
 if is_service_enabled ir-api ir-cond; then
     install_ironic
+    install_ironicclient
     configure_ironic
 fi