feat(orchestrator): store cmd as file and add fn to read and update c…

[pepoviola]

…md to execute by wrapper [k8s]

cc: @mrcnski with this change we can add this logic to an sh script

if [[ $(grep "insecure-validator-i-know-what-i-do" /cfg/zombie.cmd) ]]; then 
  echo "insecure flag is already part of the cmd";
else
  echo -n " --insecure-validator-i-know-what-i-do" >> /cfg/zombie.cmd;
fi;
echo "update-cmd" > /tmp/zombiepipe;

and then just restart from the DSL