Python segfault in while running vdsm unittests - first aid

[Nir Soffer]

Hi all,

I can confirm what Francesco found - the failure is easily reproduced (100%)
when running make check with the NOSE_WITH_XUNIT=1, and when using latest
nose version from git.

This issue make the failing CI job not only useless, but harmful, wasting
everyone time.

I suggest to remove the NOSE_WITH_XNUNIT flag until nose is fixed.

To be more specific - in the shell script running the tests:

1. Disable xunit support

    # Nose 1.3.0 and later segatult with this flag
    #export NOSE_WITH_XUNIT=1 

2. Remove the Publish JUNit test result report, looking for **/nosetests.xml

Better have working tests with bad jenkins integration, then broken tests.

I changed the configuration on jenkins and the builds are successful now :-)

Nir