SEATTLE — Amid a season of offensive challenges for the Kraken, the scoring drop-off by Jordan Eberle had loomed larger than most. So, the Kraken were delighted to see Eberle pick up a couple of goals and a trio of points before Sunday night’s game was even one period done. That early outburst proved just enough to propel the Kraken to a needed 4-2 victory over a tired-looking Columbus Blue Jackets squad that was on the final leg of back-to-back games. Jared McCann also scored in the first period, reaching the 20-goal mark for his third consecutive Kraken season. Columbus had yielded three thi…