Revert to plain JUnit logo to avoid confusion
Revert to plain JUnit logo to avoid confusion

junit-team/junit,junit-team/junit4,panchenko/junit,ashleyfrieze/junit,junit-team/junit4,junit-team/junit,ashleyfrieze/junit,stefanbirkner/junit,stefanbirkner/junit,kcooney/junit,ashleyfrieze/junit,panchenko/junit,kcooney/junit,junit-team/junit,kcooney/junit,stefanbirkner/junit,junit-team/junit4,panchenko/junit