cubicweb-dataio #3486014 Miss definition of ImportRDFCommand [validation pending]

dataio cube is broken. I already use the latest version of this cube "$ hg clone"

Traceback (most recent call last):
  File "/home/jinpeng/.local/lib/python2.7/site-packages/cubicweb/", line 622, in load_cwctl_plugins
    __import__('cubes.%s.ccplugin' % cube)
  File "/volatile/cubicweb_cubes/dataio/", line 56, in <module>
    class ImportRDFCommand(Command):
  File "/volatile/cubicweb_cubes/dataio/", line 64, in ImportRDFCommand
    'choices': LIBRDF_FORMATS_MAPPING.keys(),
NameError: name 'LIBRDF_FORMATS_MAPPING' is not defined
CubicWeb 3.18.2 (user mode)

I add an "import" that can fixes the bug.

from cubes.dataio.interfaces import LIBRDF_FORMATS_MAPPING
done in0.4.1
load left0.000
closed by#56eb18061cf6 [ccplugin] Fix broken import, closes #3486014