FWaaS: Remove checks for bash scripts

[Paul Michali]

Like the change in Neutron (14408244), remove the check for bash script.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/171637

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/171637
Committed: https://git.openstack.org/cgit/openstack/neutron-fwaas/commit/?id=7d175a9ba9cd3ea70da7735007c6d74dca272c18
Submitter: Jenkins
Branch: master

commit 7d175a9ba9cd3ea70da7735007c6d74dca272c18
Author: Paul Michali <email address hidden>
Date: Wed Apr 8 13:44:54 2015 +0000

    FWaaS: 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: Id0a74c1a976c06c66ebb370d0d9e17de17dc5231
    Closes-Bug: #1441632