Extend user guide with southbound API details

Signed-off-by: Lott, Christopher (cl778h) <cl778h@att.com>
Change-Id: I66b9603eb70ad41841a06e43e4d48a70dcb9768f
diff --git a/docs/installation-guide.rst b/docs/installation-guide.rst
index 111058d..0b1de6a 100644
--- a/docs/installation-guide.rst
+++ b/docs/installation-guide.rst
@@ -2,8 +2,8 @@
 .. http://creativecommons.org/licenses/by/4.0
 .. Copyright (C) 2019 AT&T Intellectual Property
 
-A1 Installation Guide
-=====================
+Installation Guide
+==================
 
 .. contents::
    :depth: 3