[Conf] Neural: Fix the default name for max_trains

conf/modules.d/neural.conf

@@ -16,7 +16,7 @@ neural {
   #servers = 127.0.0.1:6379; # Redis server to store learning data and ANN
 
   train {
-    max_train = 1k; # Number of trains per epoch
+    max_trains = 1k; # Number of trains per epoch
     max_usages = 20; # Number of learn iterations while ANN data is valid
     learning_rate = 0.01; # Rate of learning (Torch only)
     max_iterations = 25; # Maximum iterations of learning (Torch only)