main changes:
1. for image LiveOS/squashfs.img in CentOS 7 is changed
to images/install.img
so spec and build_srpm.data are updated.
2. for pkg 'dhcp-client' is upgraded to 4.3.6 which do
not support option '-timeout' in CentOS 8, however,
"rd.net.timeout.dhcp" of dracut in CentOS 8 still add
'-timeout <arg>' when dhclient is called.
so removing "rd.net.timeout.dhcp" option in template
files for pxelinux.conf
Story: 2006729
Task: 37961
Signed-off-by: SidneyAn <ran1.an@intel.com>
Signed-off-by: Charles Short <charles.short@windriver.com>
Change-Id: Ia81b8bfd587b2570ca1d1d778a43b0e8391ac514
ae7fc29532