* bugfix: env exists check error
* support to avoid re-build pyarrow in project
* bugfix: adapt gtest for centos lib64
* bugfix: check gtest lib exists in the directory
* bugfix: find gtest with checking all libs exists
* prefix RAY_ to thirdparty env variables to avoid conflicts with other module
* arrow use glog from ray
* change the glog and gtest install dir
This tests the case in which a worker is blocked in a call to ray.get or ray.wait, and then the worker dies. Then later, the object that the worker was waiting for becomes available. We need to make sure not to try to send a message to the dead worker and then die. Related to #2790.
* enable using thirdparty env variable to find installed dependency, to speed up the build process
* fix target dependency in cmake. :-) too chaos in each CMakeLists
* check env variable defined directory exists
* Update Arrow to Plasma with glog and update the building process
* Remove ParquetExternalProject.cmake
* Fix Mac building error in CI
* Use find_package(BISON) instead of hard code
* Revert BISON binary to hard code.
* Remove build_parquet.sh
* Update setup.sh
* use cmake to build ray project, no need to appply build.sh before cmake, fix some abuse of cmake, improve the build performance
* support boost external project, avoid using the system or build.sh boost
* keep compatible with build.sh, remove boost and arrow build from it.
* bugfix: parquet bison version control, plasma_java lib install problem
* bugfix: cmake, do not compile plasma java client if no need
* bugfix: component failures test timeout machenism has problem for plasma manager failed case
* bugfix: arrow use lib64 in centos, travis check-git-clang-format-output.sh does not support other branches except master
* revert some fix
* set arrow python executable, fix format error in component_failures_test.py
* make clean arrow python build directory
* update cmake code style, back to support cmake minimum version 3.4
