Fixing test that assumed local inventory was blank

This simply adds the temp_inventory fixture to the file for this test.
There are a few tests in different locations that also use this fixture
so in the future, these could likely be consolidated.

tests/test_broker.py

@@ -1,8 +1,17 @@
-from broker import broker, Broker, helpers
+from broker import broker, Broker, helpers, settings
 from broker.providers import test_provider
 import pytest
 
 
+@pytest.fixture(scope="module")
+def temp_inventory():
+    """Temporarily move the local inventory, then move it back when done"""
+    backup_path = settings.inventory_path.rename(f"{settings.inventory_path.absolute()}.bak")
+    yield
+    settings.inventory_path.unlink()
+    backup_path.rename(settings.inventory_path)
+
+
 def test_empty_init():
     """Broker should be able to init without any arguments"""
     broker_inst = Broker()
@@ -50,7 +59,7 @@ def test_broker_empty_checkin():
     broker_inst.checkin()
 
 
-def test_broker_checkin_n_sync_empty_hostname():
+def test_broker_checkin_n_sync_empty_hostname(temp_inventory):
     """Test that broker can checkin and sync inventory with a host that has empty hostname"""
     broker_inst = broker.Broker(nick="test_nick")
     broker_inst.checkout()