Support ruby 2.5.0

app/jobs/regular/bulk_invite.rb

@@ -29,7 +29,8 @@ module Jobs
     end
 
     def read_csv_file(csv_path)
-      CSV.foreach(csv_path, encoding: "bom|utf-8") do |csv_info|
+      file = File.open(csv_path, encoding: 'bom|utf-8')
+      CSV.new(file).each do |csv_info|
         if csv_info[0]
           if (EmailValidator.email_regex =~ csv_info[0])
             # email is valid
@@ -45,6 +46,8 @@ module Jobs
     rescue Exception => e
       log "Bulk Invite Process Failed -- '#{e.message}'"
       @failed += 1
+    ensure
+      file.close
     end
 
     def get_group_ids(group_names, csv_line_number)