Fix python shebang

The current shebang requires /usr/bin/python which is not available in
Ubuntu Jammy by default.

Change-Id: Id64d6bba35e3dcecac7772964b81aea51661b6cb

barbican/cmd/barbican_manage.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright 2010-2015 OpenStack LLC.
 # All Rights Reserved.
 #

barbican/cmd/db_manage.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright 2010-2015 OpenStack LLC.
 # All Rights Reserved.
 #

barbican/cmd/keystone_listener.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright 2014 Hewlett-Packard Development Company, L.P.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

barbican/cmd/pkcs11_kek_rewrap.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # 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

barbican/cmd/pkcs11_key_generation.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # 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

barbican/cmd/pkcs11_migrate_kek_signatures.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # 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

barbican/cmd/retry_scheduler.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright (c) 2015 Rackspace, Inc.
 #

barbican/cmd/worker.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright (c) 2013-2014 Rackspace, Inc.
 #

bin/barbican-api

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from paste import deploy
 from paste import httpserver

bin/demo_requests.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

bin/versionbuild.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright (c) 2013-2014 Rackspace, Inc.
 #