Use flat mapper for output to preserve trailing /

pegasus.properties

@@ -2,3 +2,8 @@ pegasus.register = false
 pegasus.data.configuration = sharedfs
 pegasus.stagein.clusters = 1
 pegasus.stageout.clusters = 1
+
+# For now we use the fixed storage mapper instead of the output site in the site catalog
+# because the default mapper strips trailing /, which does not work for output dirs
+pegasus.dir.storage.mapper = Fixed
+pegasus.dir.storage.mapper.fixed.url = gsiftp://hoppergrid.nersc.gov/project/projectdirs/m2187