1076864 - [RFE] params for sw-repo-sync UI/API.

Spacewalk 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.
RFE implementation:
 WebUI :  Adding one check box for each option to "rhn/channels/manage/Sync.do?cid=<ch_id>" page.
 API: channel.software.syncRepo(key, channel_label, map_sw_repo_sync_parameters)
        channel.software.syncRepo(key, channel_label, map_sw_repo_sync_parameters)