Change test_mibs to use generic wrapper function added.

The Namespace functions will be used for both single
and multi-asic platforms.

Signed-off-by: SuvarnaMeenakshi <sumeenak@microsoft.com>

tests/test_mibs.py

@@ -7,7 +7,7 @@
 modules_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 sys.path.insert(0, os.path.join(modules_path, 'src'))
 
-from sonic_ax_impl.mibs import Namespace 
+from sonic_ax_impl.mibs import Namespace
 
 class TestGetNextPDU(TestCase):
     @classmethod