Nightly: Fix issues with Kubectl exec
Nightly: Fix issues with Kubectl exec

This is a workaround to the CGroups issues that we have seen in Nightly
in the last months. Tested with Kubernetes 1.10 and it fails too, so
make this workaround to avoid Kubectl Exec issue.

Fix #3106

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

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