auto-t: remove bringing up lo interface

Several tests were setting lo up which is already done by
test-runner.

autotests/testFILS/fils_256_test.py

@@ -62,8 +62,6 @@ class Test(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         IWD.copy_to_storage('ssidFILS-256.8021x')
-        os.system('ip link set lo up')
-        pass
 
     @classmethod
     def tearDownClass(cls):

autotests/testFILS/fils_384_test.py

@@ -62,8 +62,6 @@ class Test(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         IWD.copy_to_storage('ssidFILS-384.8021x')
-        os.system('ip link set lo up')
-        pass
 
     @classmethod
     def tearDownClass(cls):

autotests/testFT-FILS/connection_test.py

@@ -122,7 +122,6 @@ class Test(unittest.TestCase):
 
     @classmethod
     def setUpClass(cls):
-        os.system('ip link set lo up')
         IWD.copy_to_storage('TestFT.8021x')
 
         cls.bss_hostapd = [ HostapdCLI(config='ft-eap-ccmp-1.conf'),

autotests/testPreauth-roam/connection_test.py

@@ -75,8 +75,6 @@ class Test(unittest.TestCase):
     def setUpClass(cls):
         IWD.copy_to_storage('TestPreauth.8021x')
 
-        os.system('ip link set lo up')
-
     @classmethod
     def tearDownClass(cls):
         IWD.clear_storage()

tools/run-tests

@@ -487,8 +487,6 @@ class TestContext(Namespace):
 			print("Ofono or Phonesim not found, skipping test")
 			return
 
-		Process(['ip', 'link', 'set', 'lo', 'up']).wait()
-
 		os.environ['OFONO_PHONESIM_CONFIG'] = '/tmp/phonesim.conf'
 
 		phonesim_args = ['phonesim', '-p', '12345', '/usr/share/phonesim/default.xml']
@@ -889,7 +887,6 @@ def post_test(ctx, to_copy):
 			elif os.path.exists('/tmp/' + f):
 				os.remove('/tmp/' + f)
 
-		Process(['ip', 'link', 'set', 'lo', 'down']).wait()
 	except Exception as e:
 		print("Exception thrown in post_test")
 	finally: