* fix wmt14 doc, remove backward, add bidirect direction in rnn api

* fix rnn unittest

* fix test_rnn_nets_static.py bug

* added UT should not exceed 15s

* fix error

* UT limit of 15s is the first to be executed

* fix error

* fix error with CI_SKIP_CPP_TEST

* modfied tiemout setting

* fix error

* add op test case for complex

* polish code details

* add xpu set constant support

* fix argument rror

* remove useless pyc file

* add transpose double grad test=develop

* add alias for fluid.contrib.mixed_precision

* fix the dowanload bug
* add sort for ips

* fix bug of matmul_v2 for broadcast

只检查增的情况，不检查删除情况

* disable test_parallel_executor_profiler in cuda 10.1

* update set_tests_properties

* fix unittst unstable issue on ci machine

* fix unittst unstable issue on ci machine

* fix unittst unstable issue on ci machine

* add service, remove ut on mac

* fix heter_profiler & add heter stop method

* fix code style

* fix compile problem when cuda_arch < 6000

* refine code

* refine code

* support roi_align & affine_channel for kunlun

* minor

[Dy2Stat] 1. Fix bug of for-range stmts. 2. Support that step value is negative in for-range stmts (#29519)

1. Fix error in _build_cond_stmt of for-range stmts. 

2. Support that step value is negative in for-range stmts

3. Fix code because of the diff between Py2 and Py3

Fix 3 Windows Unittests

test_fuse_all_reduce_pass: Paddle cannot run multiple-GPU on Windows so set single visible GPU flag
test_feed_data_check_shape_type: Paddle cannot run multiple-GPU on Windows so set single visible GPU flag
test_tsm: Winodws GPU size is not enough so decrease batch size and data size.

* Fix a bug when running on an operating system without "bash."

* add execution condition

* for ci-coverage

* get cpu information to check the precision problem

* Update compilation environment for musl version

* update dependencies

* remove test code

check cpu info

remove test code

review

* update alpine and third_party denpendencies

* add newline for ci Code format

* Sharding add hybrid-dp feature

* update sharding in distributed_strategy

* update sharding unitest

* revise code format for sharding

* improve drop out

* add VectorizedRandomGeneratorWithGenerator

* fix bug

* modify according to comments

* Add the strategy of skipping cc/cu test compilation and execution in CI, test=develop

* fix if error with CI_SKIP_TEST, test=develop

* fix add properties to test error on Linux/MAC, test=develop

* fix set test properties of test_code_generator error, test=develop

* remove test codes and advance judgment of file modification on Linux, test=develop

* rename CI_SKIP_TEST to CI_SKIP_CPP_TEST, test=document_fix

* Add branch judgement on Linux, test=develop

* Add more value to calculate hash key

* fix size_t

* polish code