fix GEARPUMP-113, remove default admin account from geardefault.conf
fix GEARPUMP-113, remove default admin account from geardefault.conf

Author: manuzhang <owenzhang1990@gmail.com>

Closes #16 from manuzhang/GEARPUMP-113.

manuzhang/incubator-gearpump,manuzhang/incubator-gearpump,manuzhang/incubator-gearpump,manuzhang/incubator-gearpump,manuzhang/incubator-gearpump