Node JS is a Horizon requirement now.

Horizon is going to start using LessCSS, so Node
JS needs to be installed now with Horizon now.

Change-Id: I416824dcab169f9be9afd3c3aa46ff911223947d
diff --git a/files/apts/horizon b/files/apts/horizon
index d93c34b..9b1c9ee 100644
--- a/files/apts/horizon
+++ b/files/apts/horizon
@@ -22,3 +22,4 @@
 python-django-nose
 python-django-registration
 python-migrate
+nodejs