manage_resource: Remove column "Admin" from group permissions table
manage_resource: Remove column "Admin" from group permissions table

A group does not have "admin" privileges. Instead, a user can have
admin privileges over a particular group.

genenetwork/genenetwork2,pjotrp/genenetwork2,pjotrp/genenetwork2,genenetwork/genenetwork2,pjotrp/genenetwork2,genenetwork/genenetwork2,pjotrp/genenetwork2,pjotrp/genenetwork2,genenetwork/genenetwork2