[Matrix]: more unit test on FlashR.
[Matrix]: more unit test on FlashR.

icoming/FlashGraph,flashxio/FlashX,icoming/FlashGraph,flashxio/FlashX,icoming/FlashGraph,zheng-da/FlashX,icoming/FlashGraph,icoming/FlashX,flashxio/FlashX,zheng-da/FlashX,flashxio/FlashX,zheng-da/FlashX,icoming/FlashX,flashxio/FlashX,icoming/FlashGraph,zheng-da/FlashX,icoming/FlashX,zheng-da/FlashX,icoming/FlashX,flashxio/FlashX,icoming/FlashX