- SLES 11/12 Spacewalk/SUSE Manager

- Change to add SLES 11/12 Systems to site Spacewalk/SUSE Manager
- remove wget in favour of curl (part of minimal installations on rhel/sles)
the package seems to not exist anymore in sles 11, didn't check sles 12 maybe it was renamed? in any case it doesn't seem to be necessary for the minimal installation -- I didn't remove it it because I was not sure :)