Fixes of the stage variable/parameter to run from scratch(unless requested otherwise)

egs/tedlium/s5/local/online/run_nnet2_ensemble.sh

@@ -8,7 +8,7 @@
 . cmd.sh
 
 
-stage=7
+stage=0
 train_stage=-10
 use_gpu=true
 dir=exp/nnet2_online/nnet_ms_ensemble

egs/tedlium/s5/local/online/run_nnet2_ms.sh

@@ -8,7 +8,7 @@
 . cmd.sh
 
 
-stage=7
+stage=0
 train_stage=-10
 use_gpu=true
 dir=exp/nnet2_online/nnet_ms_a

egs/tedlium/s5/local/online/run_nnet2_ms_perturbed.sh

@@ -9,7 +9,7 @@
 
 . ./cmd.sh
 set -e 
-stage=1
+stage=0
 train_stage=-10
 use_gpu=true
 splice_indexes="layer0/-2:-1:0:1:2 layer1/-1:2 layer3/-3:3 layer4/-7:2"