Update headings plus edits for consistency and clarity in Config Reference

Partial-Bug: #1250515

author: diane fleming

Change-Id: I92c9ad25ee5bbd2c9334c4860637faa1b358718b
backport: havana

doc/config-reference/ch_dashboardconfigure.xml

@@ -3,9 +3,9 @@
     xmlns:xi="http://www.w3.org/2001/XInclude"
     xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0"
     xml:id="ch_configuring-dashboard">
-    <title>OpenStack Dashboard</title>
+    <title>OpenStack dashboard</title>
     <para>This chapter describes how to configure the OpenStack
-        Dashboard with Apache web server.</para>
+        dashboard with Apache web server.</para>
     <xi:include href="../common/section_dashboard-configure.xml"/>
     <xi:include href="../common/section_dashboard_customizing.xml"/>
 </chapter>