OS tools refactor:

- make udev, runlevel, memory and wget separate files
- rename os_utils to os_tools and move it to test_tools
- remove ModuleRemoveMethod and set modprobe as default
- fix regex in is_kernel_module_loaded method
- remove get_sys_block_path
- move get_block_device_names method to disk tools

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

test_tools/systemctl.py

@@ -23,3 +23,13 @@ def reload_daemon():
 
 def restart_service(name):
     TestRun.executor.run_expect_success(f"systemctl restart {name}")
+
+
+def get_service_path(unit_name):
+    cmd = f"systemctl cat {unit_name}"
+
+    # path is in second column of first line of output
+    info = TestRun.executor.run_expect_success(cmd).stdout
+    path = info.splitlines()[0].split()[1]
+
+    return path