Description of problem:
'bkr job-results' correctly exports files with xml header, but 'bkr job-submit' fails to accept these as valid input.

When header is removed it works fine.

This worked fine with previous versions: either header was not present or job-submit changed.

IMO this is likely to be related to job merging which was submitted recently.

Version-Release number of selected component (if applicable):
0.6.5

How reproducible:
100%

Steps to Reproduce:
1. bkr job-results J:1 > j1.xml
2. bkr job-submit j1.xml
  
Actual results:
Traceback.

Expected results:
Successfully scheduled job.

Additional info:

Traceback:
Traceback (most recent call last):
  File "/usr/bin/bkr", line 9, in <module>
    load_entry_point('bkr.client==0.6.5', 'console_scripts', 'bkr')()
  File "/usr/lib/python2.6/site-packages/bkr/client/main.py", line 55, in main
    return parser.run()
  File "/usr/lib/python2.6/site-packages/kobo/cli.py", line 282, in run
    cmd.run(*cmd_args, **cmd_kwargs)
  File "/usr/lib/python2.6/site-packages/bkr/client/commands/cmd_job_submit.py", line 91, in run
    doc = xml.dom.minidom.parseString("<dummy>%s</dummy>" % mystring)
  File "/usr/lib64/python2.6/site-packages/_xmlplus/dom/minidom.py", line 1925, in parseString
    return expatbuilder.parseString(string)
  File "/usr/lib64/python2.6/site-packages/_xmlplus/dom/expatbuilder.py", line 942, in parseString
    return builder.parseString(string)
  File "/usr/lib64/python2.6/site-packages/_xmlplus/dom/expatbuilder.py", line 223, in parseString
    parser.Parse(string, True)
xml.parsers.expat.ExpatError: XML or text declaration not at start of entity: line 1, column 7