external GPG/SSL certs download fails zuul ci

[Radoslaw Smigielski]

Kolla CI downloads few external SSL/GPG certs, keys. Problem is that sometimes these certs become not available and zuul fails:

example: http://logs.openstack.org/51/657951/1/check/kolla-build-centos-source/e6eec3a/job-output.txt.gz

2019-05-10 07:53:24.025294 | primary | INFO:kolla.common.utils.base:Step 25/41 : RUN rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch && rpm --import https://packages.grafana.com/gpg.key && rpm --import https://repos.influxdata.com/influxdb.key && rpm --import https://packagecloud.io/gpg.key && rpm --import https://www.percona.com/downloads/RPM-GPG-KEY-percona && rpm --import /etc/pki/rpm-gpg/PERCONA-PACKAGING-KEY && rpm --import https://packages.treasuredata.com/GPG-KEY-td-agent
2019-05-10 07:53:24.219000 | primary | INFO:kolla.common.utils.base: ---> Running in a8ccd2f4fb35
2019-05-10 07:55:35.332977 | primary | INFO:kolla.common.utils.base:curl: (7) Failed connect to www.percona.com:443; Connection timed out
2019-05-10 07:55:35.333205 | primary | INFO:kolla.common.utils.base:
2019-05-10 07:55:35.334334 | primary | INFO:kolla.common.utils.base:error: https://www.percona.com/downloads/RPM-GPG-KEY-percona: import read failed(2).
2019-05-10 07:55:35.334472 | primary | INFO:kolla.common.utils.base:
2019-05-10 07:55:35.705420 | primary | INFO:kolla.common.utils.base:Removing intermediate container a8ccd2f4fb35
2019-05-10 07:55:35.715035 | primary | ERROR:kolla.common.utils.base:Error'd with the following message
2019-05-10 07:55:35.715693 | primary | ERROR:kolla.common.utils.base:The command '/bin/sh -c rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch && rpm --import https://packages.grafana.com/gpg.key && rpm --import https://repos.influxdata.com/influxdb.key && rpm --import https://packagecloud.io/gpg.key && rpm --import https://www.percona.com/downloads/RPM-GPG-KEY-percona && rpm --import /etc/pki/rpm-gpg/PERCONA-PACKAGING-KEY && rpm --import https://packages.treasuredata.com/GPG-KEY-td-agent' returned a non-zero code: 1

failed command here is:
> rpm --import https://www.percona.com/downloads/RPM-GPG-KEY-percona
and indeed that URL seems to be not available from time to time.

"rpm --import..." accepts file or URL but does not support stdin.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/658456

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Marcin Juszkiewicz <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/kolla/+/658456
Reason: cleaning old patches