Mova nova configuration initialization

* Move shared volume configuration from stack.sh to stackrc
* Move Nova network and vnc/spice configuration settings from stack.sh
  into lib/nova
* Rename NET_MAN to NETOWRK_MANAGER to match nova.conf attribute name

Change-Id: I9bd2955def553499aa832eda1f0959afe494206a
diff --git a/lib/quantum b/lib/quantum
index 862ba84..6dae13f 100644
--- a/lib/quantum
+++ b/lib/quantum
@@ -53,7 +53,7 @@
 # that must be set in localrc for connectivity across hosts with
 # Quantum.
 #
-# With Quantum networking the NET_MAN variable is ignored.
+# With Quantum networking the NETWORK_MANAGER variable is ignored.
 
 
 # Save trace setting