download_mirror.sh fails when run without '-n'.
It seems that some functions were relocated to utils.sh that
require the 'SUDO' variable to be defined. Those common utilities
are called from both download_mirror.sh and dl_rpms.sh.
download_mirror.sh sets it correctly, but dl_rpms.sh does not.
Instead dl_rpms.sh is setting 'SUDOCMD', which the utils.sh ignores.
The result is that some yum commands are runs under sudo, while others
are not. Eventually yumdownloader failes with ...
Permission denied: '/var/lib/rpm/.dbenv.lock'
The fix is to convert dl_rpms.sh to use SUDO rather than SUDOCMD.
Closes-Bug: 1980684
Signed-off-by: Scott Little <scott.little@windriver.com>
Change-Id: Ib4afdba0260e67f06997c360272f40f28fb11834
5f8fc4e7b3