Changes to List branding configs

api operation id branding.list removed and replaced with branding#list

api operation id branding#list removed and replaced with branding.list

api tag ops-branding added

removed the optional property items/is_white_label from the response with the 200 status

added the optional property items/brand_values to the response with the 200 status

added the optional property items/is_white_label to the response with the 200 status

added the optional property items/short_name to the response with the 200 status