Use apache for tls-proxy ssl termination

Stud is now abandonware (see https://github.com/bumptech/stud) and is
not packaged in xenial. Lets use Apache for SSL termination since its
there already.

Change-Id: Ifcba410f5969521e8b3d30f02795541c1661f83a
diff --git a/lib/nova b/lib/nova
index 235b533..8970a7c 100644
--- a/lib/nova
+++ b/lib/nova
@@ -800,7 +800,7 @@
 
     # Start proxies if enabled
     if is_service_enabled tls-proxy; then
-        start_tls_proxy '*' $NOVA_SERVICE_PORT $NOVA_SERVICE_HOST $NOVA_SERVICE_PORT_INT &
+        start_tls_proxy nova '*' $NOVA_SERVICE_PORT $NOVA_SERVICE_HOST $NOVA_SERVICE_PORT_INT
     fi
 
     export PATH=$old_path