Introduce unit and integration directories (#441)

tests/integration/__init__.py

+# Copyright  2016-2022 Maël Azimi <m.a@moul.re>
+#
+# Silkaj is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Silkaj is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with Silkaj. If not, see <https://www.gnu.org/licenses/>.

tests/unit/__init__.py

+# Copyright  2016-2022 Maël Azimi <m.a@moul.re>
+#
+# Silkaj is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Silkaj is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with Silkaj. If not, see <https://www.gnu.org/licenses/>.