replace shebang '/bin/bash' for '/usr/bin/env bash'

Allows better portability of bash scripting between Linux
distributions.

Change-Id: Ia0ec079581398bcffbf20bb8206860bcec0e6e7a
Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
diff --git a/job/tf-worker/generate_yaml.sh b/job/tf-worker/generate_yaml.sh
index 60ae846..56d0867 100755
--- a/job/tf-worker/generate_yaml.sh
+++ b/job/tf-worker/generate_yaml.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Copyright (c) 2019, Arm Limited. All rights reserved.
 #
diff --git a/job/tf-worker/is_juno_config.sh b/job/tf-worker/is_juno_config.sh
index 0d8f1c8..c1514c2 100755
--- a/job/tf-worker/is_juno_config.sh
+++ b/job/tf-worker/is_juno_config.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Copyright (c) 2019, Arm Limited. All rights reserved.
 #
diff --git a/job/tf-worker/manage_artefacts.sh b/job/tf-worker/manage_artefacts.sh
index dbfc4eb..63fac83 100755
--- a/job/tf-worker/manage_artefacts.sh
+++ b/job/tf-worker/manage_artefacts.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Copyright (c) 2019, Arm Limited. All rights reserved.
 #
diff --git a/job/tf-worker/parse_test.sh b/job/tf-worker/parse_test.sh
index fead3a7..98a8030 100755
--- a/job/tf-worker/parse_test.sh
+++ b/job/tf-worker/parse_test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Copyright (c) 2019, Arm Limited. All rights reserved.
 #
diff --git a/job/tf-worker/run_fvp_test.sh b/job/tf-worker/run_fvp_test.sh
index 4ec3912..48a83e4 100755
--- a/job/tf-worker/run_fvp_test.sh
+++ b/job/tf-worker/run_fvp_test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Copyright (c) 2019-2020, Arm Limited. All rights reserved.
 #
diff --git a/job/tf-worker/should_build_local.sh b/job/tf-worker/should_build_local.sh
index b3fde29..3328cef 100755
--- a/job/tf-worker/should_build_local.sh
+++ b/job/tf-worker/should_build_local.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Copyright (c) 2019, Arm Limited. All rights reserved.
 #