RUBY-1025 #features is available through a server directly

Author: estolfo

lib/mongo/database/view.rb

@@ -51,9 +51,9 @@ class View
       def collection_names(options = {})
         @batch_size = options[:batch_size]
         server = next_primary
-        @limit = -1 if server.context.features.list_collections_enabled?
+        @limit = -1 if server.features.list_collections_enabled?
         collections_info(server).collect do |info|
-          server.context.features.list_collections_enabled? ?
+          server.features.list_collections_enabled? ?
             info[Database::NAME] : info[Database::NAME].sub("#{@database.name}.", '')
         end
       end