Description of problem:
entitlement-check.py does not work for manifest but is mentioned in rhn-upgrade's README

# grep entitlement-check doc/preparations.txt 
    ./entitlement-check.py --rhn-cert=~/new.cert
re-run entitlement-check.py in order to re-test the new certificate.

# ./entitlement-check.py --rhn-cert=~/$MANIFEST_FILE 
Traceback (most recent call last):
  File "./entitlement-check.py", line 323, in <module>
    main()
  File "./entitlement-check.py", line 80, in main
    cert = parse_cert(options.rhn_cert)
  File "./entitlement-check.py", line 261, in parse_cert
    xmldoc = minidom.parse(os.path.expanduser(filename))
  File "/usr/lib64/python2.6/site-packages/_xmlplus/dom/minidom.py", line 1915, in parse
    return expatbuilder.parse(file)
  File "/usr/lib64/python2.6/site-packages/_xmlplus/dom/expatbuilder.py", line 926, in parse
    result = builder.parseFile(fp)
  File "/usr/lib64/python2.6/site-packages/_xmlplus/dom/expatbuilder.py", line 207, in parseFile
    parser.Parse(buffer, 0)
xml.parsers.expat.ExpatError: not well-formed (invalid token): line 1, column 2


Actual results:
When user follows the instructions, they hit the following traceback

Expected results:
Make the script work for manifest or do not tell user to use it