Test: Increase logs for Kube-dns issues
Test: Increase logs for Kube-dns issues

- Added kubedns logs in reportFailed.
- Added a new fallback option in `WaitForKubeDNSEntry` to know in case
of fail if the issue is that the DNS entry does not exits, or cannot
connect to kube-dns service.
- Use service IP instead of the kube-dns pod IP.

Signed-off-by: Eloy Coto <2a8acc28452926ceac4d9db555411743254cf5f9@gmail.com>

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