HAWQ-1141. Correct default values.
HAWQ-1141. Correct default values.

* hawq.repo.prefix=hdb
* hawq.addons.repo.prefix=hdb-add-ons

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