HAWQ-1559 - Fix travis ci build failure due to missing apr package
HAWQ-1559 - Fix travis ci build failure due to missing apr package

wengyanqing/incubator-hawq,wengyanqing/incubator-hawq,outofmem0ry/incubator-hawq,jianlirong/incubator-hawq,lavjain/incubator-hawq,wengyanqing/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,outofmem0ry/incubator-hawq,jianlirong/incubator-hawq,lavjain/incubator-hawq,outofmem0ry/incubator-hawq,wengyanqing/incubator-hawq,outofmem0ry/incubator-hawq,wengyanqing/incubator-hawq,jianlirong/incubator-hawq,lavjain/incubator-hawq,lavjain/incubator-hawq,wengyanqing/incubator-hawq,outofmem0ry/incubator-hawq,lavjain/incubator-hawq,jianlirong/incubator-hawq,outofmem0ry/incubator-hawq,lavjain/incubator-hawq,wengyanqing/incubator-hawq,outofmem0ry/incubator-hawq,wengyanqing/incubator-hawq,lavjain/incubator-hawq,jianlirong/incubator-hawq,lavjain/incubator-hawq,outofmem0ry/incubator-hawq