Add test_rnnslu to travis

Author: nouiz

.travis.yml

@@ -23,7 +23,7 @@ env:
   - PART="test.py:test_logistic_sgd test.py:test_logistic_cg test.py:test_mlp test.py:test_convolutional_mlp test.py:test_dA"
   - PART="test.py:test_SdA test.py:test_lstm"
   - PART="test.py:test_dbn"
-  - PART="test.py:test_rbm test.py:test_rnnrbm"
+  - PART="test.py:test_rbm test.py:test_rnnrbm test.py:test_rnnslu"
   - PART="-e test.py"
 
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