Add expdef in event-generator configuration.

conf/event-generator/expdef.yml

+experiment:
+  DATELIST: 20201001
+  MEMBERS: "m[0-39]"
+  CHUNKSIZEUNIT: hour
+  CHUNKSIZE: 1
+  NUMCHUNKS: 2
+  CHUNKINI: 0
+  CALENDAR: standard
\ No newline at end of file