Restructured the installation-instruction file into indexed sub files

Restructured the installation-instruction file into indexed sub files

Take-two of this patch,
originally merged: f479b77c4f7c0d11196e3902bb7e60ff8e34a1fe
reverted: bffb8e0e27f21934a4bbb1138427f2adda6c583d

Created a section based structure for the installation-instruction.
It should show on the html artifact as a structured web page.  We may want to move
some sections to other directories to incorporate them into the release configguide.
Left that for step 2...

Now includes updates to the rpm spec so as not to break the build.

Change-Id: I7c0d46467de668883fcd29ae7deaa20151bacdb2
Signed-off-by: ChristopherPrice <christopher.price@ericsson.com>
Signed-off-by: Dan Radez <dradez@redhat.com>