make oauth client trully optional (#84)

Same old song, after migraiton to packages some optional modules are
being imported globally which lead to making hard dependency

tests/ahriman/core/auth/conftest.py

@@ -1,6 +1,7 @@
 import pytest
 
-from ahriman.core.auth import Mapping, OAuth
+from ahriman.core.auth.mapping import Mapping
+from ahriman.core.auth.oauth import OAuth
 from ahriman.core.configuration import Configuration
 from ahriman.core.database import SQLite
 

tests/ahriman/core/auth/test_auth.py

@@ -1,4 +1,6 @@
-from ahriman.core.auth import Auth, Mapping, OAuth
+from ahriman.core.auth import Auth
+from ahriman.core.auth.mapping import Mapping
+from ahriman.core.auth.oauth import OAuth
 from ahriman.core.configuration import Configuration
 from ahriman.core.database import SQLite
 from ahriman.models.user import User

tests/ahriman/core/auth/test_mapping.py

@@ -1,6 +1,6 @@
 from pytest_mock import MockerFixture
 
-from ahriman.core.auth import Mapping
+from ahriman.core.auth.mapping import Mapping
 from ahriman.models.user import User
 from ahriman.models.user_access import UserAccess
 

tests/ahriman/core/auth/test_oauth.py

@@ -3,7 +3,7 @@ import pytest
 
 from pytest_mock import MockerFixture
 
-from ahriman.core.auth import OAuth
+from ahriman.core.auth.oauth import OAuth
 from ahriman.core.exceptions import OptionError
 
 

tests/ahriman/web/conftest.py

@@ -9,7 +9,7 @@ from unittest.mock import MagicMock
 
 import ahriman.core.auth.helpers
 
-from ahriman.core.auth import OAuth
+from ahriman.core.auth.oauth import OAuth
 from ahriman.core.configuration import Configuration
 from ahriman.core.database import SQLite
 from ahriman.core.repository import Repository