syncservice: Fix SNTSyncTest (#810)
syncservice: Fix SNTSyncTest (#810)

Failing preflight early if the daemonConn doesn't return a response the tests. This fix is a bit awkward, I tried to add the defaults in setUp but then you can't overwrite the stubs in methods that need to do it
tburgin/santa,tburgin/santa,russellhancox/santa,google/santa,google/santa,google/santa,russellhancox/santa,tburgin/santa,russellhancox/santa