fix data race in integration
fix data race in integration

Move garden started to after setting up the fake backend. In practice this
wasn't really a race, but the Go runtime probably couldn't know that (as half
of what triggered the race was shelling out to the executor binary).

Signed-off-by: Sheel Choksi <ae3f9674456405c06387031a36653604e96a41b0@pivotallabs.com>

cloudfoundry-incubator/executor