Fix Python 3 pylint errors

************* Module ipaserver.install.ipa_kra_install
ipaserver/install/ipa_kra_install.py:25: [W0402(deprecated-module), ] Uses of a deprecated module 'optparse')
************* Module ipapython.install.core
ipapython/install/core.py:163: [E1101(no-member), _knob] Module 'types' has no 'TypeType' member)
************* Module ipatests.test_ipapython.test_dn
ipatests/test_ipapython/test_dn.py:1205: [W1505(deprecated-method), TestDN.test_x500_text] Using deprecated method assertEquals())
************* Module ipa-ca-install
install/tools/ipa-ca-install:228: [E1101(no-member), install_master] Instance of 'ValueError' has no 'message' member)
install/tools/ipa-ca-install:232: [E1101(no-member), install_master] Instance of 'ValueError' has no 'message' member)

Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Simo Sorce <ssorce@redhat.com>
Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>

ipapython/install/core.py

@@ -11,7 +11,6 @@ import collections
 import functools
 import itertools
 import sys
-import types
 
 import six
 
@@ -24,6 +23,7 @@ __all__ = ['InvalidStateError', 'KnobValueError', 'Property', 'knob',
            'Configurable', 'group', 'Component', 'Composite']
 
 NoneType = type(None)
+builtin_type = type
 
 # Configurable states
 _VALIDATE_PENDING = 'VALIDATE_PENDING'
@@ -160,7 +160,7 @@ def _knob(type=_missing, default=_missing, bases=_missing, _order=_missing,
 
     if bases is _missing:
         bases = (KnobBase,)
-    elif isinstance(bases, types.TypeType):
+    elif isinstance(bases, builtin_type):
         bases = (bases,)
 
     if cli_names is None or isinstance(cli_names, str):