utils.os_release() broken for RHEL 4 and 5

[Vreman, Peter]

Current cobbler devel does not start anymore on RHEL. The problem is the os_release()
detection code.

Stopping cobbler daemon:                                   [FAILED]
Starting cobbler daemon: Traceback (most recent call last):
  File "/usr/bin/cobblerd", line 102, in ?
    main()
  File "/usr/bin/cobblerd", line 90, in main
    api = bootapi.BootAPI(log_settings=log_settings)
  File "/usr/lib/python2.4/site-packages/cobbler/api.py", line 96, in __init__
    self.os_version = utils.os_release()
  File "/usr/lib/python2.4/site-packages/cobbler/utils.py", line 750, in
os_release
    return (make, float(version), rest)
ValueError: invalid literal for float(): 5server




Below are relevant RHEL 4.6 and 5.2 outputs that can be used for the os detection:

# cat /etc/redhat-release
Red Hat Enterprise Linux AS release 4 (Nahant Update 6)
# rpm -q --whatprovides redhat-release
redhat-release-4AS-7

# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 5.2 (Tikanga)
# rpm -q --whatprovides redhat-release
redhat-release-5Server-5.2.0.4



Regards,
Peter



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