Fixes #2993, Refs #2918 -- Reverted [3960]; [3960] fixed a potential data validation problem for SQLite, but broke usage of LazyDate. The proper fix is to complete the model validators to catch _all_ invalid inputs. 
Fixes #2993, Refs #2918 -- Reverted [3960]; [3960] fixed a potential data validation problem for SQLite, but broke usage of LazyDate. The proper fix is to complete the model validators to catch _all_ invalid inputs. 


git-svn-id: 554f83ef17aa7291f84efa897c1acfc5d0035373@4105 bcc190cf-cafb-0310-a4f2-bffc1f526a37

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