xfsqa: more sh to bash conversions

A new test is using /bin/sh and failing on debian. Clean it up and all the
remaining uses of /bin/sh.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

new

@@ -1,4 +1,4 @@
-#! /bin/sh
+#! /bin/bash
 #
 #-----------------------------------------------------------------------
 #  Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
@@ -93,7 +93,7 @@ echo -n "Creating skeletal script for you to edit ..."
 year=`date +%Y`
 
 cat <<End-of-File >$id
-#! /bin/sh
+#! /bin/bash
 # FS QA Test No. $id
 #
 # what am I here for?