tests: py2 cleanup - remove subclassing of object

Type: refactor

Change-Id: I9096e3b473110350e1e8e5936e3c4c164f8969a7
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>

test/util.py

@@ -112,7 +112,7 @@ def check_core_path(logger, core_path):
             "   current core pattern is: %s" % corefmt)
 
 
-class NumericConstant(object):
+class NumericConstant:
 
     desc_dict = {}
 
@@ -131,7 +131,7 @@ class NumericConstant(object):
         return ""
 
 
-class Host(object):
+class Host:
     """ Generic test host "connected" to VPPs interface. """
 
     @property