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.

sandeep1027/zurmo_,sandeep1027/zurmo_,raymondlamwu/zurmotest,raymondlamwu/zurmotest,sandeep1027/zurmo_,raymondlamwu/zurmotest