SAN DIEGO — Leonard Glenn Francis, the military contractor better known as “Fat Leonard,” will not be called by the prosecution to testify against five former naval officers charged with accepting bribes from him, it was revealed in court Monday. Prosecutors did not address why they are forgoing testimony from Francis, the mastermind of the long-running conspiracy who has already pleaded guilty and been cooperating with the government for years. Nor do they have to. Francis, nicknamed for his immense physique, has billed himself as the prosecution’s star witness and has been biding his time un…