Merge pull request #10895 from nickyfantasy/high_level_api_machine_translation

Simplify Machine Translation demo by using Trainer API

python/paddle/fluid/tests/book/high-level-api/CMakeLists.txt

@@ -13,3 +13,4 @@ add_subdirectory(understand_sentiment)
 add_subdirectory(label_semantic_roles)
 add_subdirectory(word2vec)
 add_subdirectory(recommender_system)
+add_subdirectory(machine_translation)

python/paddle/fluid/tests/book/high-level-api/machine_translation/CMakeLists.txt

@@ -0,0 +1,7 @@
+file(GLOB TEST_OPS RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}" "test_*.py")
+string(REPLACE ".py" "" TEST_OPS "${TEST_OPS}")
+
+# default test
+foreach(src ${TEST_OPS})
+    py_test(${src} SRCS ${src}.py)
+endforeach()