disable transformer (#13515)

Author: gongweibao

python/paddle/fluid/tests/unittests/CMakeLists.txt

@@ -80,7 +80,8 @@ if(WITH_DISTRIBUTE)
         py_test_modules(test_dist_se_resnext MODULES test_dist_se_resnext SERIAL)
     endif(NOT APPLE)
     py_test_modules(test_dist_transpiler MODULES test_dist_transpiler)
-    py_test_modules(test_dist_transformer MODULES test_dist_transformer SERIAL)
+    #FIXME(gongwb): random fails.
+    #py_test_modules(test_dist_transformer MODULES test_dist_transformer SERIAL)
 endif()
 py_test_modules(test_parallel_executor_crf MODULES test_parallel_executor_crf SERIAL)
 py_test_modules(test_parallel_executor_fetch_feed MODULES test_parallel_executor_fetch_feed SERIAL)