The end of an era at Nokia, as veteran executive Marc Rouanne is to leave, a casualty of the Finnish firm’s latest reorganization. This one converges the fixed and mobile network businesses in a single Access Networks division, and there will be a new president for the combined operation, whose revenues currently total €8.5bn ($9.7bn). That person is yet to be announced, but will not be Rouanne, who might have been seen as an obvious candidate, as president of mobile networks. He is now listed as president of a French spend management company called Dhatim. He will now be replaced in that role by Tommi Uitto, another long term Nokia employee, having been at the firm for 23 years. He…