Description of problem:
When cdn-sync fails because of "21:18:45 ERROR: Cannot retrieve repository metadata (repomd.xml) for repository: .... Please verify its path and try again" it returns exit code 0. IMO this can be a problem for automated scripts whose logic might depend on exit code of the cdn-sync.


Version-Release number of selected component (if applicable):
spacewalk-backend-cdn-2.5.3-34.el6sat.noarch


How reproducible:
rarely


Steps to Reproduce:
1. Run cdn-sync and make it return that error (maybe by setting wrong IP for cd.redhat.com in /etc/hosts?)


Actual results:
# cdn-sync -c rhel-x86_64-server-7
21:18:46 ======================================
21:18:46 | Channel: rhel-x86_64-server-7
21:18:46 ======================================
21:18:46 Sync of channel started.
21:18:46 Repo URL: https://cdn.redhat.com/content/dist/rhel/server/7/7Server/x86_64/os
21:18:46 ERROR: Cannot retrieve repository metadata (repomd.xml) for repository: rhel-7-server-rpms__7Server__x86_64. Please verify its path and try again
21:18:46 Repo URL: https://cdn.redhat.com/content/dist/rhel/server/7/7.1/x86_64/kickstart
21:18:46 ERROR: Cannot retrieve repository metadata (repomd.xml) for repository: ks-rhel-x86_64-server-7-7.1. Please verify its path and try again
21:18:46 Repo URL: https://cdn.redhat.com/content/dist/rhel/server/7/7.2/x86_64/kickstart
21:18:46 ERROR: Cannot retrieve repository metadata (repomd.xml) for repository: ks-rhel-x86_64-server-7-7.2. Please verify its path and try again
21:18:46 Repo URL: https://cdn.redhat.com/content/dist/rhel/server/7/7.0/x86_64/kickstart
21:18:46 ERROR: Cannot retrieve repository metadata (repomd.xml) for repository: ks-rhel-x86_64-server-7-7.0. Please verify its path and try again
21:18:46 Sync of channel completed in 0:00:00.
21:18:46 Total time: 0:00:00
# echo $?
0


Expected results:
Should return non-0 exit code