Description of problem:
Importing errata on non-existing packages fails unexpectedly.

Version-Release number of selected component (if applicable):
rhn-clone-errata.py git commit is 98a72d90238ccd2feb615adb392f8a9ce66debb4

How reproducible:
I was able to do this on Red Hat Enterprise Linux Server release 5.10

Steps to Reproduce:
1. ./rhn-clone-errata.py -f /etc/rhn-clone.cfg -b `date --date="-30days" +%Y%m%d` -c rhel-x86_64-server-6 -iI

Actual results:

[helfman@myserver ~]$ sudo ./rhn-clone-errata.py -f /etc/rhn-clone.cfg -b `date --date="-30days" +%Y%m%d` -c rhel-x86_64-server-6 -iI
RHSA-2013:1764
        Errata Already Exists.  RHSA-2013:1764:R6-64
RHBA-2013:1758
Ignoring missing package(s) and continuing...
        11/25/13 - tuna bug fix update
        Errata Created: 110
Can't Update Errata Details!
failed to set issue_date: <Fault 2801: 'redstone.xmlrpc.XmlRpcFault: Invalid argument(s): issue_date'>
Can't Update Errata Details!
failed to set update_date: <Fault 2801: 'redstone.xmlrpc.XmlRpcFault: Invalid argument(s): update_date'>
Error Publishing Errata!
Traceback (most recent call last):
  File "./rhn-clone-errata.py", line 873, in ?
    main()
  File "./rhn-clone-errata.py", line 849, in main
    spwPublish = mySPW.errataPublish (spwErrataName, [chanMap[chan]], 0)
  File "./rhn-clone-errata.py", line 490, in errataPublish
    errata = self.server.errata.publish(self.rhnSession,name,channels)
  File "/usr/lib/python2.4/xmlrpclib.py", line 1096, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python2.4/xmlrpclib.py", line 1383, in __request
    verbose=self.__verbose
  File "/usr/lib/python2.4/xmlrpclib.py", line 1147, in request
    return self._parse_response(h.getfile(), sock)
  File "/usr/lib/python2.4/xmlrpclib.py", line 1286, in _parse_response
    return u.close()
  File "/usr/lib/python2.4/xmlrpclib.py", line 744, in close
    raise Fault(**self._stack[0])
xmlrpclib.Fault: <Fault 1201: 'redstone.xmlrpc.XmlRpcFault: Invalid channel label'>


Expected results:
Errata should be imported

Additional info:
I already have valid errata, as you can see from the output, however new errata is not being published due to an invalid issue date but notes in addition that I have an invalid channel label. I don't believe this is user error, however if there is something that I have setup incorrectly, I am willing to test another configuration or argument to import the errata properly.

Feel free to move this to a non-urgent bug, however I have put this as such because it is due to an error in importing the errata, itself.

Here are the relevant parts of my configuration information on the channel noted in this bug:

[ChanMap]
rhel-x86_64-server-6 = rhel6-x86-64-november

[ChanSuffixMap]
rhel-x86_64-server-6 = R6-64


Thanks!
-jgh