Move fstab to tools

Signed-off-by: Katarzyna Treder <katarzyna.treder@h-partners.com>

test_utils/fstab.py

@@ -1,20 +0,0 @@
-#
-# Copyright(c) 2019-2021 Intel Corporation
-# SPDX-License-Identifier: BSD-3-Clause
-#
-
-from test_tools import fs_utils
-from test_utils import systemd
-
-
-def add_mountpoint(device, mount_point, fs_type, mount_now=True):
-    fs_utils.append_line("/etc/fstab",
-                         f"{device.path} {mount_point} {fs_type.name} defaults 0 0")
-    systemd.reload_daemon()
-    if mount_now:
-        systemd.restart_service("local-fs.target")
-
-
-def remove_mountpoint(device):
-    fs_utils.remove_lines("/etc/fstab", device.path)
-    systemd.reload_daemon()