Adding cleanup CI scripts to source control (#4916)

* Adding cleanup CI scripts to source control

* cleanup

* spelling

* small fixes

hack/jenkins/osx_cleanup_and_reboot.sh

+#!/bin/sh
+
+# Copyright 2019 The Kubernetes Authors All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Periodically cleanup and reboot if no Jenkins subprocesses are running.
+set -uf -o pipefail
+
+PATH=/usr/local/bin:/sbin:/usr/local/sbin:$PATH
+
+exit_if_jenkins() {
+  jenkins=$(pgrep java)
+  if [[ "$jenkins" -- "" ]]; then
+    echo "no java, no jenkins"
+    return 0
+  fi
+  pstree $jenkins | grep -v java && echo "jenkins is running..." && exit 1
+}
+
+exit_if_jenkins
+echo "waiting to see if any jobs are coming in..."
+sleep 15
+exit_if_jenkins
+echo "doing it"
+killall java
+sudo rm -Rf ~jenkins/.minikube || echo "could not delete minikube"
+sudo rm -Rf ~/jenkins/minikube-integration/* || true
+sudo reboot

hack/jenkins/windows_cleanup_and_reboot.bat

+:: Copyright 2019 The Kubernetes Authors All rights reserved.
+::
+:: Licensed under the Apache License, Version 2.0 (the "License");
+:: you may not use this file except in compliance with the License.
+:: You may obtain a copy of the License at
+::
+::     http://www.apache.org/licenses/LICENSE-2.0
+::
+:: Unless required by applicable law or agreed to in writing, software
+:: distributed under the License is distributed on an "AS IS" BASIS,
+:: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+:: See the License for the specific language governing permissions and
+:: limitations under the License.
+
+:: Periodically cleanup and reboot if no Jenkins subprocesses are running.
+
+@echo off
+call :jenkins
+echo waiting to see if any jobs are coming in...
+timeout 30
+call :jenkins
+echo doing it
+taskkill /IM putty.exe
+taskkill /F /IM java.exe
+powershell -Command "Stop-VM minikube"
+powershell -Command "Delete-VM minikube"
+rmdir /S /Q C:\Users\admin\.minikube
+shutdown /r
+
+:jenkins
+tasklist | find /i /n "e2e-windows-amd64.exe">NUL
+if %ERRORLEVEL% == 0 exit 1
+exit /B 0