Move fluent API unit test files into their own subdirectory. (#78)

Prior to this commit, test/conftest.py held a couple pytest fixtures used only
for the fluent API unit tests. This commit better isolates those fixtures.

Author: haydenroche5

test/conftest.py test/fluent_api/conftest.pytest/conftest.py renamed to test/fluent_api/conftest.py

@@ -4,7 +4,7 @@
 from unittest.mock import MagicMock
 
 sys.path.insert(0,
-                os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+                os.path.abspath(os.path.join(os.path.dirname(__file__), '../..')))
 
 import notecard  # noqa: E402