Merge branch 'publisher-search' into 'master'

Publisher search

See merge request portalmec/portalmec!492

app/models/learning_object.rb

@@ -92,7 +92,7 @@ class LearningObject < ApplicationRecord
 
   scope :search_import, -> { includes(:object_type, :tags, :subjects, :educational_stages, :publisher) }
   def search_data
-    source = !publisher.nil? && publisher.is_a?(Institution) ? publisher.name : nil
+    source = !publisher.nil? ? publisher.name : ""
     type = object_type.try(:id)
     {
       name: name,

app/services/search_service/learning_object.rb

@@ -37,7 +37,7 @@ module SearchService
     private
 
     def search_fields
-      [:name, :description, :author, :object_type]
+      [:name, :description, :author, :object_type, :source]
     end
 
     def mount_filter