Improve savanna-dashboard installation

* split configurations setting to one-per-line;
* don't set SAVANNA_URL in horizon configs - we're now using endpoits
  keystone to find corresponding edpoint.

Change-Id: I9497a511656a2f70e923b651c66c5ef2917a0939
diff --git a/lib/savanna-dashboard b/lib/savanna-dashboard
index 7713a78..691b23f 100644
--- a/lib/savanna-dashboard
+++ b/lib/savanna-dashboard
@@ -37,8 +37,9 @@
 
 function configure_savanna_dashboard() {
 
-    echo -e "SAVANNA_URL = \"http://$SERVICE_HOST:8386/v1.1\"\nAUTO_ASSIGNMENT_ENABLED = False" >> $HORIZON_DIR/openstack_dashboard/local/local_settings.py
-    echo -e "HORIZON_CONFIG['dashboards'] += ('savanna',)\nINSTALLED_APPS += ('savannadashboard',)" >> $HORIZON_DIR/openstack_dashboard/settings.py
+    echo -e "AUTO_ASSIGNMENT_ENABLED = False" >> $HORIZON_DIR/openstack_dashboard/local/local_settings.py
+    echo -e "HORIZON_CONFIG['dashboards'] += ('savanna',)" >> $HORIZON_DIR/openstack_dashboard/settings.py
+    echo -e "INSTALLED_APPS += ('savannadashboard',)" >> $HORIZON_DIR/openstack_dashboard/settings.py
 
     if is_service_enabled neutron; then
         echo -e "SAVANNA_USE_NEUTRON = True" >> $HORIZON_DIR/openstack_dashboard/local/local_settings.py