Adds to swift install chapter

Updates from grizzly doc

TF Changes:
* link in object storage overview for architecture
* remove references to auth node and swauth

Updates markup and addresses review comments

Change-Id: I42b87f019361408a55c2b77d0c9778351ce997d8

doc/training-guide/card128-swift.xml

@@ -6,7 +6,7 @@
   xml:id="configure-swift">
     <title>Install Swift</title>
   <!-- this maps to user story "Card128 - As an associate trainee I need to be able to install and configure OpenStack Object Storage (swift) in the Controller Node -->
-  <xi:include href="../install-guide/section_object-storage-install-ubuntu.xml"
+  <xi:include href="../install-guide/object-storage/section_object-storage-install.xml"
     xpointer="xmlns(db=http://docbook.org/ns/docbook) xpath(//*[@xml:id = 'general-installation-steps-swift']/*[not(self::db:title)])">
     <xi:fallback><para><mediaobject><imageobject><imagedata fileref="figures/openstack-training-remote-content-not-available.png" format="PNG"/></imageobject></mediaobject>Remote content not available</para><para>image source</para><para><link xlink:href="https://docs.google.com/drawings/d/1J2LZSxmc06xKyxMgPjv5fC0blV7qK6956-AeTmFOZD4/edit?usp=sharing">https://docs.google.com/drawings/d/1J2LZSxmc06xKyxMgPjv5fC0blV7qK6956-AeTmFOZD4/edit?usp=sharing</link></para></xi:fallback>
   </xi:include>