remove newgrp, add lsof

hack/jenkins/common.sh

@@ -214,6 +214,8 @@ if [[ "${kprocs}" != "" ]]; then
   sudo -E kill ${kprocs} || true
 fi
 
+sudo apt-get -y install lsof
+
 # clean up none drivers binding on 8443
   none_procs=$(sudo lsof -i :8443 | tail -n +2 | awk '{print $2}' || true)
   if [[ "${none_procs}" != "" ]]; then

hack/jenkins/installers/check_install_docker.sh

@@ -29,7 +29,6 @@ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debi
 sudo apt-get -y update
 sudo apt-get -y install docker-ce docker-ce-cli containerd.io
 sudo usermod -aG docker jenkins
-sudo newgrp docker
 
 echo "Installing latest kubectl"
 curl -LO "https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl"