VPNaaS: Remove check for bash usage

Like Neutron, removing the check for bash script usage and
changed bash scripts to use '#!/usr/bin/env bash'.

Change-Id: Iab8ce0382695be8d8c7cd644b036dbf41dfd90b3
Closes-Bug: #1441244

tools/check_bash.sh

@@ -1,31 +0,0 @@
-#! /bin/sh
-
-# Copyright (C) 2014 VA Linux Systems Japan K.K.
-# Copyright (C) 2014 YAMAMOTO Takashi <yamamoto at valinux co jp>
-# 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.
-
-# The purpose of this script is to avoid casual introduction of more
-# bash dependency.  Please consider alternatives before commiting code
-# which uses bash specific features.
-
-# Ignore comments, but include shebangs
-OBSERVED=$(grep -E '^([^#]|#!).*bash' tox.ini tools/* | wc -l)
-EXPECTED=6
-if [ ${EXPECTED} -ne ${OBSERVED} ]; then
-    echo Unexpected number of bash usages are detected.
-    echo Please read the comment in $0
-    exit 1
-fi
-exit 0

tools/clean.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 rm -rf ./*.deb ./*.tar.gz ./*.dsc ./*.changes
 rm -rf */*.deb
 rm -rf ./plugins/**/build/ ./plugins/**/dist

tools/with_venv.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2011 OpenStack Foundation.
 # All Rights Reserved.
 #

tox.ini

@@ -57,7 +57,6 @@ deps =
   {[testenv]deps}
   pylint
 commands =
-  sh ./tools/check_bash.sh
   flake8
   pylint --rcfile=.pylintrc --output-format=colorized {posargs:neutron_vpnaas}
   {toxinidir}/tools/check_unit_test_structure.sh