[et-mgmt-tools] Cobbler 0.4.8 -- slight import improvements

[Michael DeHaan]

As reported on IRC, the new RHEL5/Centos5 aware Cobbler import process 
wasn't working too well with RHEL4 and Centos 4.   This release should 
fix those problems.   If you've imported earlier successfully, there's 
no reason to reimport. 

In addition, cobbler's calls to "createrepo" no longer use the 
"--basedir" parameter, which is apparently absent on newer createrepos 
-- so repository creation will no longer fail when using a newer Cobbler 
server (like FC7) that has the new createrepo.

--Michael