make db flush command independent of cwd
make db flush command independent of cwd

nicktimko/Planet-Lab,freedomgames/Planet-Lab,andymcguinness/Planet-Lab,freedomgames/Planet-Lab,andymcguinness/Planet-Lab,andymcguinness/Planet-Lab,freedomgames/Planet-Lab,nicktimko/Planet-Lab,nicktimko/Planet-Lab,nicktimko/Planet-Lab