Separate authentication tests into new test modules

This MR separates the tests of gwdatafind_server.authentication into their own test modules, so that test_api_v1.py just tests the v1 API (with noauth).

tests/conftest.py

@@ -5,46 +5,15 @@
 """Test configuration for gwdatafind_server
 """
 
-import os
-from pathlib import Path
-from unittest import mock
-
 import pytest
 
-from gwdatafind_server import create_app
-
-from cryptography.hazmat.backends import default_backend
-from cryptography.hazmat.primitives import serialization
-from cryptography.hazmat.primitives.asymmetric.rsa import generate_private_key
-
-
-@pytest.fixture(scope="session")  # one per suite is fine
-def private_key():
-    return generate_private_key(
-        public_exponent=65537,
-        key_size=2048,
-        backend=default_backend(),
-    )
-
-
-@pytest.fixture(scope="session")
-def public_key(private_key):
-    return private_key.public_key()
-
-
-@pytest.fixture(scope="session")
-def public_pem(public_key):
-    return public_key.public_bytes(
-        encoding=serialization.Encoding.PEM,
-        format=serialization.PublicFormat.SubjectPublicKeyInfo,
-    )
+from utils import create_test_app
 
 
-@mock.patch.dict("os.environ")
 @pytest.fixture
 def app():
-    os.environ["LDR_LOCATION"] = str(Path(__file__).parent)
-    return create_app()
+    # default app to noauth for ease
+    return create_test_app(auth="None")
 
 
 @pytest.fixture