Fixed fileset title uniqueness issue

hyrax/app/actors/hyrax/actors/file_actor.rb

@@ -73,14 +73,14 @@ module Hyrax
       # actual characterization service
       def set_characterization_data(s3_file_url, file_set)
         path = URI.parse(Addressable::URI.unencode(s3_file_url)).path
-        file_name = path.split('/')[-1]
+        file_name = path.split('/')[-1].downcase
         uploaded_file_id = path.split('/')[-2]
         uploaded_file = Hyrax::UploadedFile.find(uploaded_file_id)
         
         parent_object = file_set.parent_object
         siblings = parent_object.file_sets
 
-        duplicate_record = siblings.select {|fs| fs.title[0] == file_name && fs.id != file_set.id }
+        duplicate_record = siblings.select {|fs| fs.title[0].downcase == file_name && fs.id != file_set.id }
         new_title = nil
 
         if duplicate_record.present?
@@ -190,7 +190,7 @@ module Hyrax
       end
 
       def genrate_file_set_title(siblings, file_name)
-        existing_titles = siblings.map{ |fs| fs.title[0] }
+        existing_titles = siblings.map{ |fs| fs.title[0].downcase }
 
         base_name, extension = File.basename(file_name, ".*"), File.extname(file_name)