Require python-six for EPEL package
Require python-six for EPEL package

python2-six is not available.

Signed-off-by: Athos Ribeiro <9cdfc39bfa10853bf9ad64090808d55fee7504ca@redhat.com>

DBuildService/dockerfile-parse,jpopelka/dockerfile-parse,jpopelka/dockerfile-parse,DBuildService/dockerfile-parse