* "rewrite the test case"

* "follow comment"

* "remove inplace in single op"

* "fix ci"

* "add transpiler case"

* fix conflict

* "fix reshape"

* "delete reshape inplace attr"

* "follo the comments"

* "rerun ci"

* Hidden APIs for While, StaticRNN, ParallelDo.

* cherry picked

* "cherry picked platform"

* "add comment"

* "fix ci"

fix fluid_benchmark.py

* add flatten op

* refine regularization for selected_rows

* clean lookup_table

* refine rpc_server_test

* temporally disable rpc_server_test

* fix rpc_server_test

* add unit test