nose issues

[brancomat]

To sum up: since python3-nose had some issues (https://travis-ci.org/github/ARPA-SIMC/dballe/jobs/749576071) after a quick chat with @spanezz I tried to switch to python3-nose2, but now it doesn't find nose: https://travis-ci.org/github/ARPA-SIMC/dballe/jobs/749635872

Note that this also affects arkimet (I switched to python3-nose2 there too): https://travis-ci.org/github/ARPA-SIMC/arkimet/jobs/749636523

My only request (besides having a working test suite) is to use the same nose package (nose or nose2) in dballe, arkimet or other ARPAE-SIMC projects.

Some additional infos:

• internal server otto or trentadue are available for testing and they have both version of nose installed.
• there are differences in available binaries that maybe could help explain the different behaviour:

  
  $ rpm -ql python3-nose|grep bin
  /usr/bin/nosetests       # note: only in fedora, not in centos
  /usr/bin/nosetests-3
  /usr/bin/nosetests-3.6
  $ rpm -ql python3-nose2|grep bin
  /usr/bin/nose2
  /usr/bin/nose2-3.6

[brancomat]

Fixed in 6d3b5b6 (also fixed in arkimet)