test: Wait for POD policy revision increment also after policy delete
test: Wait for POD policy revision increment also after policy delete

Wait for each POD incrementing their policy revision also after
deleting a policy, as otherwise there is a race between policy
deletion and the following test traffic that expects policy deletion
to have taken effect already.

This fixes CI flakes following policy deletes like:

08:35:50 STEP: Deleting Egress deny all clusterwide policy
08:35:51 STEP: Testing ingress connectivity from "app2" to "app1" in "2020060908341k8spolicytestclusterwidepoliciestestclusterwidecon" namespace
FAIL: Ingress connectivity should be allowed for service in 2020060908341k8spolicytestclusterwidepoliciestestclusterwidecon namespace
Expected command: kubectl exec -n 2020060908341k8spolicytestclusterwidepoliciestestclusterwidecon app2-88b7f8c4b-cvg64 -- curl --path-as-is -s -D /dev/stderr --fail --connect-timeout 5 --max-time 20 http://10.110.187.138/public -w "time-> DNS: '%{time_namelookup}(%{remote_ip})', Connect: '%{time_connect}',Transfer '%{time_starttransfer}', total '%{time_total}'" 
To succeed, but it failed:
Exitcode: 28 
Stdout:
 	 time-> DNS: '0.000013()', Connect: '0.000000',Transfer '0.000000', total '5.000688'
Stderr:
 	 command terminated with exit code 28

Signed-off-by: Jarno Rajahalme <0f1ab0ac7dffd9db21aa539af2fd4bb04abc3ad4@covalent.io>

cilium/cilium,tgraf/cilium,tklauser/cilium,tklauser/cilium,cilium-team/cilium,michi-covalent/cilium,cilium-team/cilium,tklauser/cilium,tklauser/cilium,tgraf/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,tgraf/cilium,tklauser/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,tgraf/cilium,cilium/cilium,michi-covalent/cilium,tgraf/cilium,tgraf/cilium