+ This bug was similar to https://bugzilla.redhat.com/show_bug.cgi?id=1045871 +

Description of problem:
When trying to download x86_64 packages and explicitly using --archlist=x86_64 it also downloads i686 packages.

Version-Release number of selected component (if applicable):
yum-utils-1.1.31-45.el7.noarch
yum-3.4.3-158.el7.centos.noarch

How reproducible:


Steps to Reproduce:

1. Download packages from @core, specific packages error:
$ yumdownloader --archlist=x86_64 \
   btrfs-progs \
   glibc \
   iptables \
   libsysfs \
   parted \
   procps-ng \
   sg3_utils-libs \
   util-linux \
   xfsprogs

2. See the output
3. $ ls | grep i686

Actual results:
All packages for i686 and x86_64
$ ls -1
btrfs-progs-4.9.1-1.el7.i686.rpm
btrfs-progs-4.9.1-1.el7.x86_64.rpm
glibc-2.17-222.el7.i686.rpm
glibc-2.17-222.el7.x86_64.rpm
iptables-1.4.21-24.1.el7_5.i686.rpm
iptables-1.4.21-24.1.el7_5.x86_64.rpm
libsysfs-2.1.0-16.el7.i686.rpm
libsysfs-2.1.0-16.el7.x86_64.rpm
parted-3.1-29.el7.i686.rpm
parted-3.1-29.el7.x86_64.rpm
procps-ng-3.3.10-17.el7_5.2.i686.rpm
procps-ng-3.3.10-17.el7_5.2.x86_64.rpm
sg3_utils-libs-1.37-12.el7.i686.rpm
sg3_utils-libs-1.37-12.el7.x86_64.rpm
util-linux-2.23.2-52.el7_5.1.i686.rpm
util-linux-2.23.2-52.el7_5.1.x86_64.rpm
xfsprogs-4.5.0-15.el7.i686.rpm
xfsprogs-4.5.0-15.el7.x86_64.rpm

Expected results:
Only packages for x86_64
$ ls -1
btrfs-progs-4.9.1-1.el7.x86_64.rpm
glibc-2.17-222.el7.x86_64.rpm
iptables-1.4.21-24.1.el7_5.x86_64.rpm
libsysfs-2.1.0-16.el7.x86_64.rpm
parted-3.1-29.el7.x86_64.rpm
procps-ng-3.3.10-17.el7_5.2.x86_64.rpm
sg3_utils-libs-1.37-12.el7.x86_64.rpm
util-linux-2.23.2-52.el7_5.1.x86_64.rpm
xfsprogs-4.5.0-15.el7.x86_64.rpm