fixes for failing test cases

hyrax/app/renderers/nested_person_attribute_renderer.rb

@@ -5,7 +5,7 @@ class NestedPersonAttributeRenderer < NestedAttributeRenderer
     value = parse_value(input_value)
 
     unless value.blank?
-      value = value.sort_by{|a| a['role'][0] == "creator" ? 0 : 1}
+      value = value.sort_by{|a| (a['role'].present? && a['role'][0] == "creator") ? 0 : 1}
     end
 
     value.each do |v|