In an unexpected outburst, Keshnee Kemp, the founding partner of The Karl Stefanovic Show, has launched a furious spray at critics. Insiders reveal to New Idea that it is all to protect her embattled business partner, former Today co-host Karl Stefanovic, 51. The drama kicked off when an Aussie media outlet questioned Keshnee’s career progression. The publication suggested her former life running glossy magazines, where she championed average-si…