E2E test: replace sleep with a closed-loop mechanism

[mflendrich]

Today, our E2E test cases work the following way:

1. apply KIC-readable manfiests to Kubernetes
2. wait for KIC to apply config to Kong proxy
3. assert

Step 2 is implemented as sleep 6 today because there's no obvious way to tell that Kong is ready to proxy traffic using up-to-date configuration.

kubernetes-ingress-controller/test/integration/util/run-one-test.sh

Line 23 in 86bba5b

sleep 6

The scope of this issue is to replace sleep with a mechanism that is aware of Kong proxy's successful application of configuration.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[mflendrich]

No longer a problem since #1040