Add sleep time into default route testing (#439)
Add sleep time into default route testing (#439)

For mixer e2e-smoketest, we have been observing near constant failures. They seem to be related to failure to resolve default routes. This change increases the sleep time between retries in an attempt to make the tests more resilient.

Former-commit-id: 2ce32b7e1b5a4e2eaffe8d7c30447aa361c9d764
smawson/istio,istio/istio,frankbu/istio,sebastienvas/istio,sebastienvas/istio,geeknoid/istio,geeknoid/istio,geeknoid/istio,geeknoid/istio,istio/istio,mandarjog/istio,mandarjog/istio,mandarjog/istio,istio/istio,sebastienvas/istio,sebastienvas/istio,smawson/istio,istio/istio,geeknoid/istio,frankbu/istio,mandarjog/istio,frankbu/istio,istio/istio,sebastienvas/istio,frankbu/istio,frankbu/istio,mandarjog/istio,smawson/istio,smawson/istio,frankbu/istio,geeknoid/istio,smawson/istio,smawson/istio