Remove references to Sunspot.config.indexing since it doesn't seem to…

… exist.

lib/sunspot/mongoid.rb

@@ -40,15 +40,15 @@ module ClassMethods
       # The sunspot solr_index method is very dependent on ActiveRecord, so
       # we'll change it to work more efficiently with Mongoid.
       def solr_index(opts={})
-        batch_size = opts[:batch_size] || Sunspot.config.indexing.default_batch_size
+        batch_size = opts[:batch_size] || 50 # Sunspot.config.indexing.default_batch_size
         0.step(count, batch_size) do |offset|
           Sunspot.index(limit(batch_size).skip(offset))
         end
         Sunspot.commit
       end
 
       def solr_index_orphans(opts={})
-        batch_size = opts[:batch_size] || Sunspot.config.indexing.default_batch_size
+        batch_size = opts[:batch_size] || 50 #Sunspot.config.indexing.default_batch_size
         count = self.count
         indexed_ids = solr_search_ids { paginate(:page => 1, :per_page => count) }.to_set
         only(:id).each do |object|