Feature/add user storage threshold

[LucRoy]

Introduction of users storage limit

• Users will now be imposed a 1.5TB storage limit.
• Utilization calculation will be done base of a specific date, meaning all new storage after that date will be counted toward the user storage utilization.
• Utilization will be cached and kept up to date within a 24 hour window, any request made after the 24 hour window from the initial request will be refreshed from calculating the utilization from the contents table.
• New rest api /user/utilization will now be exposed to return utilization data

[jimmylee]

LGTM! looks good

[10d9e]

LGTM!

[10d9e]

LGTM