ubuntu_lxc failed with failed to download image index on B/D/E PowerPC

Test failed with container download:
FAIL: lxc-tests: lxc-test-apparmor-mount (2s)
---
/usr/sbin/deluser: The user `lxcunpriv' does not exist.
Setting up the GPG keyring
Downloading the image index
ERROR: Failed to download http://images.linuxcontainers.org//meta/1.0/index-user
lxc-create: tmp.moDP5526M1: lxccontainer.c: create_run_template: 1617 Failed to create container from template
lxc-create: tmp.moDP5526M1: tools/lxc_create.c: main: 327 Failed to create container tmp.moDP5526M1
lxc-destroy: tmp.moDP5526M1: tools/lxc_destroy.c: main: 259 Container is not defined
umount: /sys/kernel/security/apparmor/features/mount: not mounted.
sed: can't read /run/lxc/nics: No such file or directory
---
PASS: lxc-tests: lxc-test-attach (1s)
FAIL: lxc-tests: lxc-test-autostart (0s)
---
Setting up the GPG keyring
Downloading the image index
ERROR: Failed to download http://images.linuxcontainers.org//meta/1.0/index-system
lxc-create: lxc-test-auto: lxccontainer.c: create_run_template: 1617 Failed to create container from template
lxc-create: lxc-test-auto: tools/lxc_create.c: main: 327 Failed to create container lxc-test-auto
FAIL
---
PASS: lxc-tests: lxc-test-basic (0s)
PASS: lxc-tests: lxc-test-cgpath (1s)
PASS: lxc-tests: lxc-test-checkpoint-restore (0s)
PASS: lxc-tests: lxc-test-cloneconfig (3s)
PASS: lxc-tests: lxc-test-clonetest (0s)
PASS: lxc-tests: lxc-test-concurrent (1s)
PASS: lxc-tests: lxc-test-config-jump-table (0s)
PASS: lxc-tests: lxc-test-console (1s)
PASS: lxc-tests: lxc-test-console-log (9s)
PASS: lxc-tests: lxc-test-containertests (3s)
PASS: lxc-tests: lxc-test-createtest (1s)
PASS: lxc-tests: lxc-test-criu-check-feature (0s)
PASS: lxc-tests: lxc-test-destroytest (0s)
PASS: lxc-tests: lxc-test-device-add-remove (1s)
PASS: lxc-tests: lxc-test-get_item (0s)
PASS: lxc-tests: lxc-test-getkeys (0s)
PASS: lxc-tests: lxc-test-list (0s)
PASS: lxc-tests: lxc-test-locktests (3s)
PASS: lxc-tests: lxc-test-lxc-attach (2s)
PASS: lxc-tests: lxc-test-lxcpath (0s)
FAIL: lxc-tests: lxc-test-no-new-privs (0s)
---
+ DONE=0
+ trap cleanup EXIT SIGHUP SIGINT SIGTERM
+ mkdir -p /etc/lxc/
+ cat
+ ARCH=i386
+ type dpkg
++ dpkg --print-architecture
+ ARCH=ppc64el
+ lxc-create -t download -n c1 -- -d ubuntu -r xenial -a ppc64el
Setting up the GPG keyring
Downloading the image index
ERROR: Failed to download http://images.linuxcontainers.org//meta/1.0/index-system
lxc-create: c1: lxccontainer.c: create_run_template: 1617 Failed to create container from template
lxc-create: c1: tools/lxc_create.c: main: 327 Failed to create container c1

Need to check if this is a firewall issue for the vlan which PowerPC locates.