Description
got ArgumentError: argument --num_routes conflicting option string(s) during run all tests

Steps to reproduce the issue:

1. ./run_tests.sh -d mlnx-2700-215 -n jss-t0 -t t0

Describe the results you received:
Exception
File "/usr/local/bin/pytest", line 11, in
load_entry_point('pytest==4.6.5', 'console_scripts', 'pytest')()
File "/usr/local/lib/python2.7/dist-packages/_pytest/config/init.py", line 63, in main
config = _prepareconfig(args, plugins)
File "/usr/local/lib/python2.7/dist-packages/_pytest/config/init.py", line 207, in _prepareconfig
pluginmanager=pluginmanager, args=args
File "/usr/local/lib/python2.7/dist-packages/pluggy/hooks.py", line 286, in call
return self._hookexec(self, self.get_hookimpls(), kwargs)
File "/usr/local/lib/python2.7/dist-packages/pluggy/manager.py", line 93, in _hookexec
return self._inner_hookexec(hook, methods, kwargs)
File "/usr/local/lib/python2.7/dist-packages/pluggy/manager.py", line 87, in
firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
File "/usr/local/lib/python2.7/dist-packages/pluggy/callers.py", line 203, in _multicall
gen.send(outcome)
File "/usr/local/lib/python2.7/dist-packages/_pytest/helpconfig.py", line 94, in pytest_cmdline_parse
config = outcome.get_result()
File "/usr/local/lib/python2.7/dist-packages/pluggy/callers.py", line 81, in get_result
_reraise(*ex) # noqa
File "/usr/local/lib/python2.7/dist-packages/pluggy/callers.py", line 187, in _multicall
res = hook_impl.function(*args)
File "/usr/local/lib/python2.7/dist-packages/_pytest/config/init.py", line 687, in pytest_cmdline_parse
self.parse(args)
File "/usr/local/lib/python2.7/dist-packages/_pytest/config/init.py", line 901, in parse
args, self.option, namespace=self.option
File "/usr/local/lib/python2.7/dist-packages/_pytest/config/argparsing.py", line 101, in parse_setoption
parsedoption = self.parse(args, namespace=namespace)
File "/usr/local/lib/python2.7/dist-packages/_pytest/config/argparsing.py", line 78, in parse
self.optparser = self._getparser()
File "/usr/local/lib/python2.7/dist-packages/_pytest/config/argparsing.py", line 95, in _getparser
arggroup.add_argument(*n, **a)
File "/usr/lib/python2.7/argparse.py", line 1312, in add_argument
return self._add_action(action)
File "/usr/lib/python2.7/argparse.py", line 1513, in _add_action
action = super(_ArgumentGroup, self)._add_action(action)
File "/usr/lib/python2.7/argparse.py", line 1326, in _add_action
self._check_conflict(action)
File "/usr/lib/python2.7/argparse.py", line 1464, in _check_conflict
conflict_handler(action, confl_optionals)
File "/usr/lib/python2.7/argparse.py", line 1471, in _handle_conflict_error
raise ArgumentError(action, message % conflict_string)
argparse.ArgumentError: argument --num_routes: conflicting option string(s): --num_routes

Describe the results you expected:
run all tests without error