Create Branding model

We need a Branding model that has an optional many-to-1 relation with an Institution. The branding can be turned on at the glri-Resource level and be displayed in the portal. The branding needs some attributes:

• Institution ID
• Branding Name
• Branding Code (e.g., uga, ugalaw), no spaces, lowercase
• Branding Image (Upload)
• Branding Text

At this time, a Resource can has_one a Branding record that is associated with the GLRI Institution associated with that Resource. This should be shown as a drop-down on the Resource form, only for GLRI users. Attempting to set a Branding for non-GLRI records should be a validation error.

This branding information should be indexed to Solr as follows:

Institution

• a multivalued branding field, which contains the aggregated information for each branding record, hopefully accessible as a hash with the Branding Code as key.

Allocation

• a single string field for show_branding that contains a Branding Code value for one of the Institution's Branding records