fix jshint complaints in mapmodel
fix jshint complaints in mapmodel

AbdulMuhsinSE/mapjs,AbdulMuhsinSE/mapjs,pyxis777/mapjs,danielrasmuson/mapjs,bhargav175/mapjs,pyxis777/mapjs,mindmup/mapjs,pyxis777/mapjs,danielrasmuson/mapjs,AbdulMuhsinSE/mapjs,bhargav175/mapjs,danielrasmuson/mapjs,mindmup/mapjs,bhargav175/mapjs