fix building against python 3.6

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>

0001-tests-catch-ModuleNotFoundError-as-well.patch

@@ -0,0 +1,31 @@
+From 51a1694d7c5dc2a9276ba21678cf8560d90ecfe5 Mon Sep 17 00:00:00 2001
+From: Igor Gnatenko <ignatenko@redhat.com>
+Date: Tue, 13 Dec 2016 14:54:29 +0100
+Subject: [PATCH] tests: catch ModuleNotFoundError as well
+
+From What's New in Python 3.6:
+Import now raises the new exception ModuleNotFoundError (subclass of ImportError)
+when it cannot find a module. Code that currently checks for
+ImportError (in try-except) will still work. (Contributed by Eric Snow in issue 15767.)
+
+Signed-off-by: Igor Gnatenko <ignatenko@redhat.com>
+---
+ tests/test_plugin.py | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/tests/test_plugin.py b/tests/test_plugin.py
+index 23a95c33..88e51719 100644
+--- a/tests/test_plugin.py
++++ b/tests/test_plugin.py
+@@ -93,6 +93,6 @@ class PluginNonExistentTest(tests.support.TestCase):
+         with tests.support.wiretap_logs('dnf', dnf.logging.SUBDEBUG, stream):
+             dnf.plugin._import_modules(package, ('nonexistent.py',))
+ 
+-        end = ('ImportError: No module named \'testpkg\'\n' if dnf.pycomp.PY3
+-               else 'ImportError: No module named testpkg.nonexistent\n')
++        end = ('Error: No module named \'testpkg\'\n' if dnf.pycomp.PY3
++               else 'Error: No module named testpkg.nonexistent\n')
+         self.assertTracebackIn(end, stream.getvalue())
+-- 
+2.11.0
+

dnf.spec

@@ -25,7 +25,7 @@
 
 Name:           dnf
 Version:        2.0.0
-Release:        0.rc2.5%{?dist}
+Release:        0.rc2.6%{?dist}
 Summary:        Package manager forked from Yum, using libsolv as a dependency resolver
 # For a breakdown of the licensing, see PACKAGE-LICENSING
 License:        GPLv2+ and GPLv2 and GPL
@@ -33,6 +33,8 @@ URL:            https://github.com/rpm-software-management/dnf
 Source0:        %{url}/archive/%{name}-%{version}/%{name}-%{version}.tar.gz
 # https://bugzilla.redhat.com/show_bug.cgi?id=1380945
 Patch666:       0001-Revert-group-treat-mandatory-pkgs-as-mandatory-if-st.patch
+# https://github.com/rpm-software-management/dnf/pull/686
+Patch777:       0001-tests-catch-ModuleNotFoundError-as-well.patch
 BuildArch:      noarch
 BuildRequires:  cmake
 BuildRequires:  gettext