TemporaryAllocator is a singleton used for allocating memory for Cudnn. Since it is a singleton, we can delete it for better performance in memory.

We replace TemporaryAllocator by CUDADeviceContextAllocator and CUDADeviceContextAllocation, which uses stream callback to delete the memory allocated for the stream to avoid singleton.

Also added data_feed_proto to operator to fix CI in CPU compilation

* remove attribute in Allocator::Allocate, test=develop

* fix travis ci error, test=develop

test=develop

* human readable memory warns test=develop

* update test=develop

* refine test=develop

* fix build test=develop

test=develop

test=develop

Fix code to support cpplint syntax check

test=develop

- add naive executor
- fix concurrency performance issue

Use OO style to rewrite memory allocation.

* memory init

* add env

* refine anounce

* Add check for Nan

* Debug

* Add env for cc_test

* Add env for py_test and nv_test

* Remove py_test env

* Add env for py_test

* serial test_recognize_digits

* Test FLAGS_init_allocated_mem function for unit test

* Init allocated mem for op unit test

* Add env for all unit test

* Fix cpplint errors with paddle/fluid/platform/gpu_info.*

* Update

* fix gpu memory allocation policy

* refine codes

* fix code style

* follow comments

* add gflags for C++ unittest

* Add debug logs in scope, meta_cache and memory

* Add missing deps