Reason: There are pre-looping data initialization and post-looping
reintialization in Stored Proc DailyProcssToCreateHistory. If the batch
commit is in 6-wwi-data-simulation.sql, there will be duplicated
pre-loop initialization, security setting and wrong post-loop data
initialization.
Solution: Move the batch commit into DailyProcssToCreateHistory's WHILE
loop.
Known behavior: the day after 20151220 will trigger
RecordColdRoomTemperatures, which is slow and it's my next work item.
