Added deployment_install AIO-DX combo manual

Draft of the combined deployment and installation
instructions for the AIO-DX StarlingX configuration.

Applied review comments from Tee Ngo and Al Bailey.

Changed "tailf" to "tail -f" per Al Bailey review.

I placed new/updated information from the AIO-DX wiki that
was updated by Tee Ngo.

I addressed Bart Wensley and Bob Churches comments.

 * Leaving section on "Set Ceph pool replication" for now.
 * Removed section on "Providernetworking setup (pre-Stein).
 * Removed the note in the "Providernetworking setup:
   Network Segment Ranges (Stein)" section.
 * Removed the "Bring Down Services" section.

Patch 13: Removed the "Set Ceph pool replication" section.
          Also, removed "Stein" per Al Bailey.

Change-Id: I196b2a309257b4fa8b8cceb079bbaadcd97a9257
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Abraham Arce <abraham.arce.moreno@intel.com>
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>

doc/source/deploy_install_guides/index.rst

@@ -12,6 +12,7 @@ The following list provides help on choosing the correct deployment guide:
    :maxdepth: 1
 
    latest/aio_simplex/index
+   latest/aio_duplex/index
 
 - Following are deployment and installation guides for past StarlingX
   releases that have been archived: