engine CI failing upgrade tasks due to missing dependencies

Hi infra, Upgrade tasks in engine CI seem to be failing due to missing dependencies. E.g. [1]: Error downloading packages: vdsm-jsonrpc-java-1.3.5-1.20170103113616.gitfbe3dec.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-engine-dwh-setup-4.1.0-0.0.master.20170103090346.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-engine-dwh-4.1.0-0.0.master.20170103090346.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-engine-cli-3.6.9.3-0.1.20170103.git61c5da9.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-imageio-proxy-1.0.0-0.201701021040.git022783e.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-engine-sdk-python-3.6.9.2-0.1.20170103.gite99bbd1.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-imageio-proxy-setup-1.0.0-0.201701021040.git022783e.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-engine-extension-aaa-jdbc-1.1.3-0.0.master.20170103103520.gitd0ff686.el7.noarch: [Errno 256] No more mirrors to try. ovirt-vmconsole-proxy-1.0.4-0.0.master.20170103150743.git51ed572.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-vmconsole-1.0.4-0.0.master.20170103150743.git51ed572.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-iso-uploader-4.1.0-0.0.master.20170103091034.git14502bd.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-setup-lib-1.1.0-1.20170103120007.git402fec4.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-host-deploy-1.6.0-0.0.master.20170103133827.git7eea7f1.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-host-deploy-java-1.6.0-0.0.master.20170103133827.git7eea7f1.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-engine-wildfly-overlay-10.0.0-1.el7.noarch: [Errno 256] No more mirrors to try. ovirt-engine-dashboard-1.1.0-0.4.20170103gitfad882b.el7.centos.noarch: [Errno 256] No more mirrors to try. ovirt-imageio-common-1.0.0-0.201701021040.git022783e.el7.centos.noarch: [Errno 256] No more mirrors to try. [1] http://jenkins.ovirt.org/job/ovirt-engine_master_upgrade-from-4.1_el7_cre...