[RaisinBread] Improve the variance and diversity of the candidate data

[satvik-tha-god]

Inconsistent and unvaried date data for candidate in RaisinBread For the second entry the candidate has been registered 4 years before being born Describe the solution you'd like

• Fix date consistencies in the candidate table for RaisinBread
• Improve the variance of the DoB and Date_registered for more varied Age of Registrations

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[ridz1208]

I think all entries which have a date diff bigger than 9 months should be fixed