Change requirements to support python 3.7

fix avg pool trt bug 

test=develop

test=develop

add warm up in TestMultiThreadPrediction

fix(Mac): fix unittest of macos

[MKLDNN][JIT][AVX512] Elementwise Mul

Fix gpu load model and demo_ci on trt

test=develop

test=develop

test=develop

add allocator.h copy

disable two openblas test temporary

Implement leaky relu converter from fluid to tensorRT

test=develop

Add python example for resize_nearest Api

Optimize the stack operator

test=develop

test=develop

* Initialize the elementwise plugin.

* Implement the basic CUDA kernel of elementwise plugin.
test=develop

jitcode act support all size

Introducing MKL to softmax for inference

* refine GraphCheck
test=develop

* fix ci fail
test=develop

This reverts commit be506703.

add api example of brelu, leaky_relu and soft_relu

* Modify some infer-shape in compile-time.

[WIP] Correcting and extending MKLDNN residual connection fuse pass

test=develop

* Optimize layer_norm operator with AVX intrinsic functions

* Revert the wrong modifications

* Implement the jit kernel for layer_norm operator

* Add math headfile to fix the compile issue (test=develop)

* Add math headfile to fix the compile issue (test=develop)

* Fixed the intrinsic headfile issue (test=develop)

* Fix the conflicts (test=develop)

* Revert for CUDA compiler (test=develop)

* Fixed the cuda depency (test=develop)

* Fix the marco issues (test=develop)

Fix tensorrt plugin cmake dependency, test=develop