Ship default configuration files

Specify data files to ship explicitly and set include_package_data to
False so it doesn't pick up random cruft that happens to be in the work
tree.

Signed-off-by: Nils Philippsen <nils@redhat.com>

setup.py

@@ -34,7 +34,13 @@ setup(
     url='https://pagure.io/Fedora-Infra/distgit-bugzilla-sync',
     keywords='fedora',
     packages=['distgit_bugzilla_sync'],
-    include_package_data=True,
+    include_package_data=False,
+    package_data={
+        'distgit_bugzilla_sync': [
+            'default-config-files/configuration.toml',
+            'default-config-files/email_overrides.toml',
+        ],
+    },
     zip_safe=False,
     install_requires=INSTALL_REQUIRES,
     tests_require=TESTS_REQUIRE,