Adding a special exception for user mixin with person.  Was previously creating an extra column in the table customfieldsmodel.  This column was unnecessary.
Adding a special exception for user mixin with person.  Was previously creating
an extra column in the table customfieldsmodel.  This column was unnecessary.

speixoto/zurmo-for-school,speixoto/zurmo-for-school,speixoto/zurmo-for-school