By Emma-Victoria Farr and Krystal Hu LONDON (Reuters) – German software firm SAP is working with investment bank Moelis & Co to sell its corporate learning software business Litmos as it seeks to streamline its operations and focus on cloud-based revenue, three sources told Reuters. The sale of California-based Litmos, which is profitable, could fetch a valuation of more than $1 billion, said the sources, who requested anonymity because the matter is private. Moelis is expected to start an auction process in the coming weeks and will mainly target tech-focused private equity funds in the Unite…