Is Chicago Lyric Opera director Andrew Davis shopping for a new job? “Last weekend, the 59-year-old Davis squeezed Friday night and Sunday afternoon performances with the Pittsburgh Symphony into a schedule that included conducting Wagner’s five-hour “Siegfried” in Chicago Saturday night. Pittsburgh’s music director, Mariss Jansons, will be leaving his post at the close of this season after seven years, and last week in an interview with a Pittsburgh newspaper before the concerts, Davis candidly admitted being interested in the position.”