Clean up stack.sh config

* Clean up interactive configuration
* Complete moving initialization of service-specific varialbes into the
  service lib/* files.
* Cosmetic cleanups

Change-Id: Iea14359bd224dd5533201d4c7cb1437d5382c4d1
diff --git a/lib/nova b/lib/nova
index f0c8315..d96ed4f 100644
--- a/lib/nova
+++ b/lib/nova
@@ -65,6 +65,9 @@
 
 QEMU_CONF=/etc/libvirt/qemu.conf
 
+NOVNC_DIR=$DEST/noVNC
+SPICE_DIR=$DEST/spice-html5
+
 
 # Nova Network Configuration
 # --------------------------