A Muslim man’s religious discrimination claims against his former employer has largely survived a motion for summary judgment by the employer, which maintains the man’s demotion was because of his job performance — not his religion.On Wednesday, U.S. District Judge Matthew F. Kennelly granted G4S Secure Solutions’ motion for summary judgment with respect to one of Mohammed Z. Hussaini’s claims that he was retaliated against because he left work early to attend Friday prayers.But Kennelly …