By Donald H. Harrison Donald H. Harrison Omri Schein SAN DIEGO – The narrowness of the stage at San Diego Musical Theatre obliged director Omri Schein to develop an imaginative set for the forthcoming Fiddler on the Roof production that will run Thursdays through Sundays, February 9 through March 10. Instead of having sets that need to be moved on and off stage, various pieces of luggage and trunks will be schlepped around and configured on-stage into a roof for the Fiddler, a bed for Tevye’s scary dream, chairs and tables for the celebration of Tzeitel’s wedding to Motel, and, oh yes, suitcas…