Touch up shebang's in scripts

Stealing @saschagrunert 's idea on making the shebangs in
the demos scripts be a bit happier on more platforms.  He
adjusted Buildah in containers/buildah#1804
and I'm adjusting here.  I also chmod to 755 so that the scripts
will run right out of the box.

Signed-off-by: TomSweeneyRedHat <[email protected]>

building/buildah_intro/buildah_intro.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 # buildah_intro.sh demo script.
 # This script will demonstrate at an introductory level
@@ -144,7 +144,7 @@ buildah_using_from_scratch() {
     sudo buildah run $newcontainer -- ls -alF /usr/local/bin
 
     /bin/cat > ./runecho.sh <<- "EOF" 
-#!/bin/bash
+#!/usr/bin/env bash
 for i in {1..9};
 do
     echo "This is a new container from buildahdemo [" $i "]"

podman_cli/podman_images.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 # podman_images.sh demo script.
 # This script will demonstrate at an introductory level

podman_cli/podman_pause_unpause.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 # podman_pause_unpause.sh demo script.
 # This script will demonstrate at an introductory level

running/BuildahInPodman/building_ctr_wo_root.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 # building_ctr_wo_root.sh demo script.
 # This script will demonstrate how you can use

running/ReplacingDocker/podman.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 # podmah.sh demo script.
 # This script will demonstrate a lot of the features of podman, concentrating

running/SELinuxEscape/breakout.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 # breakout.sh demo script.
 # This script will demonstrate a lot of the features of podman, concentrating

running/SELinuxEscape/podman.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 # podmah.sh demo script.
 # This script will demonstrate a lot of the features of podman, concentrating

running/generatekube/kubedemo-openshift.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 trap 'exit 0' INT
 

running/generatekube/kubedemo.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 trap 'exit 0' INT
 

security/SELinuxUdica/SELinuxUdica.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env sh 
+
 read -p "Using SELinux with container runtimes "
 echo ""
 

security/security_demo.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 # security_demo.sh demo script.
 # This script will demonstrate security features of buildah,podman,skopeo and cri-o