fix test skip when no local redis on py27+
fix test skip when no local redis on py27+

a-tal/pypicloud,mathcamp/pypicloud,johnswanson/pypicloud,johnswanson/pypicloud,stevearc/pypicloud,mathcamp/pypicloud,rubikloud/pypicloud,rubikloud/pypicloud,a-tal/pypicloud,a-tal/pypicloud,johnswanson/pypicloud,mathcamp/pypicloud,rubikloud/pypicloud,a-tal/pypicloud,rubikloud/pypicloud,mathcamp/pypicloud,stevearc/pypicloud,johnswanson/pypicloud,stevearc/pypicloud,stevearc/pypicloud