* Add two types of Metric Calculator: MultiTaskCalculator & CmatchRankCalculator.
* Add a config for DynamicAdjustChannelNum function to denote whether we will discard the remaining instances when they are not be distributed evenly.
* Remove CPU code in Pull/PushSparse and we will add it back when testing it fully.
* Fix some known issues: such as copying persistable vars after one epoch running.

* modify lite commit id to support var_conv_2d cascade. test=develop

* modify lite commit id. test=develop

* update external lite, test=develop

* switch WITH_TESTING to OFF, test=develop

修改了依赖lite的commit id：lite支持了var_conv_2d的级联使用

* fix compile issue, test=develop

* force link libiomp5 when mklml is enabled, test=develop

faster build by reduce by-product, reduce linking library and fix compile warning of std=c++11 (#22164)

* add collective communication library in fleet to replace mpi
* test=develop

- 添加了fluid-lite子图方式运行resnet的单测
- 修改了依赖Lite的git commit id

tweak the interface of cache_third_party function - expose the SOURCE_DIR for each external library (#21899)

* Fix openblas to support compile on Windows when WITH_MKL=OFF

* MKLDNN v1.0 rebase to Paddle 1.6
test=develop

* Add hacky paddle::string::to_string() implementation

* vectorize<int64-t>() -> vectorize() cleanup
test=develop

* PADDLE_ENFORCE and void_cast fixes
test=develop

* Rebase changes
test=develop

* Cosmetics
test=develop

* Delete MKL from mkldnn.cmake
test=develop

* CMake debug commands
test=develop

* Delete MKLDNN_VERBOSE and rebase fixes
test=develop

* Rebase fixes
test=develop

* Temporarily disable int8 resnet101 vgg16 and vgg19 tests
test=develop

* Add libmkldnn.so.1 to python setup
test=develop

* Add libmkldnn.so.1 to inference_lib cmake after rebase
test=develop

* Post rebase fixes + FC int8 changes
test=develop

* Fix LRN NHWC
test=develop

* Fix NHWC conv3d
test=develop

* Windows build fix + next conv3d fix
test=develop

* Fix conv2d on AVX2 machines
test=develop

* modify the repo address of eigen and warpctc

* fix the eigen not work on windows

* fix the eigen and warpctc can't recompile

test=develop

* make Docker to gcc 8.2, test=develop

* add -std=c11 to grpc.cmake, test=develop

test=develop

* add support to gcc8, add docker env test=develop

* add dgc.tgz to bos

* test=develop, Support for online compilation of openblas

* test=develop, Modify the prefix of openblas static library