Unify Windows unattended files

making the cmd num aligned, to avoid miss any tiny cmd in the future.
this patch is done by update win2008(NT6.0) first, then
copied to all other OSes, with necessary modification,
and cmd adjustment:
1) avoid using '/All /LimitAccess' on NT6.1, as do not supported
2) use ocsetup instead of dism on NT6.0, as do not available
3) this patch also resolved some cmd are lost at some OS(timedrift)
4) move enable ahci booting registry modification to
   <FirstLogonCommands> part to Workaround MSFT bug
5) and added explain for some cmds
6) coverted by unix2dos
7) as switched to use name to select install img, now Win 8.1 needs
   it's own unattended_file

Signed-off-by: Xiaoqing Wei <xwei@redhat.com>