By Riham Alkousaa BERLIN (Reuters) -Germany’s conservative CDU looked set to win an election in the northern state of Schleswig-Holstein on Sunday, a boost to the party of former Chancellor Angela Merkel, which was ousted from national government in federal elections last year. An exit poll by infratest dimap put the Christian Democrats (CDU) at 43% of votes, up 11 percentage points from when Schleswig-Holstein last held a state election in 2017. Chancellor Olaf Scholz’s centre-left Social Democrats, the main party in Germany’s “traffic light” coalition with the environmentalist Greens and lib…