ensure all horizon needed clients are installed from git

horizon actually uses a lot of clients no adays, ensure these are
all coming from git.

Change-Id: Ib02b96de40aed800ff8adbb59f0268fceea7777d
diff --git a/stack.sh b/stack.sh
index cdc45fd..455ccd1 100755
--- a/stack.sh
+++ b/stack.sh
@@ -666,12 +666,15 @@
 install_glanceclient
 install_cinderclient
 install_novaclient
-if is_service_enabled swift glance; then
+if is_service_enabled swift glance horizon; then
     install_swiftclient
 fi
-if is_service_enabled neutron nova; then
+if is_service_enabled neutron nova horizon; then
     install_neutronclient
 fi
+if is_service_enabled heat horizon; then
+    install_heatclient
+fi
 
 git_clone $OPENSTACKCLIENT_REPO $OPENSTACKCLIENT_DIR $OPENSTACKCLIENT_BRANCH
 setup_develop $OPENSTACKCLIENT_DIR
@@ -739,7 +742,6 @@
 fi
 
 if is_service_enabled heat; then
-    install_heatclient
     install_heat
     cleanup_heat
     configure_heat