Institution, campus and library code should be required

Purpose: The designs for incorporating locations in circ rules rely on the presence of codes for each hierarchy level. For this reason, we need to make those codes required.

Scenarios:

1. Scenario
   • • Given Institution CRUD
     • When Code is left blank
     • Then save should be disallowed and a "Please fill this in to continue" message should display below the field like it does when name field is left blank
2. Scenario
   • • Given Campus CRUD
     • When Code is left blank
     • Then save should be disallowed and a "Please fill this in to continue" message should display below the field like it does when name field is left blank
3. Scenario
   • • Given Library CRUD
     • When Code is left blank
     • Then save should be disallowed and a "Please fill this in to continue" message should display below the field like it does when name field is left blank