[RAILS] Fixed incorrect rescueing of ANSI not being available in the import Rake task

Closes elastic#15

Author: nono

elasticsearch-rails/lib/elasticsearch/rails/tasks/import.rb

@@ -15,7 +15,7 @@
 STDOUT.sync = true
 STDERR.sync = true
 
-begin; require 'ansi/progressbar' rescue LoadError; end
+begin; require 'ansi/progressbar'; rescue LoadError; end
 
 namespace :elasticsearch do