test: Policies: Shorten delay for expected fail
test: Policies: Shorten delay for expected fail

Put a wait timeout on ping commands so that they will fail after 3
seconds of no response. This cuts about 130 seconds off the L4Policy
test runtime.

Signed-off-by: Joe Stringer <16a9a54ddf4259952e3c118c763138e83693d7fd@covalent.io>

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