setools-python requires python-enum34

Fixes:
>>> import setools
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/site-packages/setools/__init__.py", line 31, in <module>
    from . import policyrep
  File "/usr/lib64/python2.7/site-packages/setools/policyrep/__init__.py", line 26, in <module>
    from .bounds import BoundsRuletype
  File "/usr/lib64/python2.7/site-packages/setools/policyrep/bounds.py", line 24, in <module>
    from .util import PolicyEnum
  File "/usr/lib64/python2.7/site-packages/setools/policyrep/util.py", line 21, in <module>
    from enum import Enum
ImportError: No module named enum

setools.spec

@@ -11,7 +11,7 @@
 
 Name:           setools
 Version:        4.1.1
-Release:        2%{?setools_pre_ver:.%{setools_pre_ver}}%{?dist}
+Release:        3%{?setools_pre_ver:.%{setools_pre_ver}}%{?dist}
 Summary:        Policy analysis tools for SELinux
 
 License:        GPLv2
@@ -80,6 +80,7 @@ This package includes the following console tools:
 %package     python
 Summary:     Policy analysis tools for SELinux  
 Recommends:  libselinux-python
+Requires:    python-enum34
 
 %description python
 SETools is a collection of graphical tools, command-line tools, and
@@ -178,6 +179,9 @@ popd
 %{_mandir}/man1/apol*
 
 %changelog
+* Mon Sep 04 2017 Petr Lautrbach <plautrba@redhat.com> - 4.1.1-3
+- setools-python requires python-enum34
+
 * Thu Aug 10 2017 Petr Lautrbach <plautrba@redhat.com> - 4.1.1-2
 - bswap_* macros are defined in byteswap.h