Fix pylint old-style-class errors

This patch fixes the errors noted by pylint where
classes are defined in an older style (old-style-class).

The following errors were resolved:

************* Module bandit.core.config
C: 30, 0: Old-style class defined. (old-style-class)
************* Module bandit.core.context
C: 24, 0: Old-style class defined. (old-style-class)
************* Module bandit.core.manager
C: 37, 0: Old-style class defined. (old-style-class)
************* Module bandit.core.meta_ast
C: 25, 0: Old-style class defined. (old-style-class)
************* Module bandit.core.test_set
C: 30, 0: Old-style class defined. (old-style-class)
C: 77, 8: Old-style class defined. (old-style-class)
************* Module bandit.core.tester
C: 29, 0: Old-style class defined. (old-style-class)

Change-Id: I48728844fd259c1e08bad5e4aa6f65352fdd0ff2

bandit/core/config.py

@@ -27,7 +27,7 @@ from bandit.core import utils
 LOG = logging.getLogger(__name__)
 
 
-class BanditConfig():
+class BanditConfig(object):
     def __init__(self, config_file=None):
         '''Attempt to initialize a config dictionary from a yaml file.
 

bandit/core/context.py

@@ -21,7 +21,7 @@ import six
 from bandit.core import utils
 
 
-class Context():
+class Context(object):
     def __init__(self, context_object=None):
         '''Initialize the class with a context, empty dict otherwise
 

bandit/core/manager.py

@@ -34,7 +34,7 @@ from bandit.core import test_set as b_test_set
 LOG = logging.getLogger(__name__)
 
 
-class BanditManager():
+class BanditManager(object):
 
     scope = []
 

bandit/core/meta_ast.py

@@ -22,7 +22,7 @@ import logging
 LOG = logging.getLogger(__name__)
 
 
-class BanditMetaAst():
+class BanditMetaAst(object):
 
     nodes = collections.OrderedDict()
 

bandit/core/test_set.py

@@ -27,7 +27,7 @@ from bandit.core import extension_loader
 LOG = logging.getLogger(__name__)
 
 
-class BanditTestSet():
+class BanditTestSet(object):
     def __init__(self, config, profile=None):
         if not profile:
             profile = {}
@@ -74,7 +74,7 @@ class BanditTestSet():
     def _load_builtins(self, filtering, profile):
         '''loads up builtin functions, so they can be filtered.'''
 
-        class Wrapper:
+        class Wrapper(object):
             def __init__(self, name, plugin):
                 self.name = name
                 self.plugin = plugin

bandit/core/tester.py

@@ -26,7 +26,7 @@ warnings.formatwarning = utils.warnings_formatter
 LOG = logging.getLogger(__name__)
 
 
-class BanditTester():
+class BanditTester(object):
     def __init__(self, testset, debug, nosec_lines):
         self.results = []
         self.testset = testset

pylintrc

@@ -11,7 +11,6 @@
 
 # TODO(browne): fix these in the future
 # C0103: invalid-name
-# C1001: old-style-class
 # E1101: no-member
 # R0204: redefined-variable-type
 # R0902: too-many-instance-attributes
@@ -30,7 +29,7 @@
 # W0613: unused-argument
 # W0621: redefined-outer-name
 # W0703: broad-except
-disable=C0111,C0301,C0325,C1001,F0401,W0511,W0142,W0622,C0103,E1101,R0204,R0902,R0911,R0912,R0913,R0914,R0915,W0110,W0141,W0201,W0401,W0603,W0212,W0612,W0613,W0621,W0703
+disable=C0111,C0301,C0325,F0401,W0511,W0142,W0622,C0103,E1101,R0204,R0902,R0911,R0912,R0913,R0914,R0915,W0110,W0141,W0201,W0401,W0603,W0212,W0612,W0613,W0621,W0703
 
 [Basic]
 # Variable names can be 1 to 31 characters long, with lowercase and underscores