Description of problem: Satellite tool spacewalk-repo-sync has parameters "no-errata", "sync-kickstart" and "fail" that can be used currently only if the tool is executed directly from shell. It will be great if those parameters can be set when the synchronization process is started from WebUI or API as well.
patch in spacewalk master: 75cbf45a7748868e593588c825bb41c1ee431485
Verified with spacewalk-java-2.3.8-28.el6sat.noarch
Re-verified on Satellite-5.7.0-RHEL6-re20150105.1 (spacewalk-java-2.3.8-96.el6sat) Using steps described in comment 0. WebUI log: Sync started: Thu Jan 15 08:11:13 2015 ['/usr/bin/spacewalk-repo-sync', '--channel', 'fedora-21', '--type', 'yum', ' --no-errata --sync-kickstart --fail']