In storage tests, always test EXT first if present

We want to start the jobs with a simple SR type storage driver.
Better fail early, with a test without any complex teardown,
if something is seriously broken.

Signed-off-by: Samuel Verschelde <[email protected]>

tests/storage/conftest.py

@@ -0,0 +1,7 @@
+def pytest_collection_modifyitems(config, items):
+    # modify ordering so that ext is always tested first,
+    # before more complex storage drivers
+    for item in reversed(list(items)):
+        if "_ext_" in item.path.name:
+            items.remove(item)
+            items.insert(0, item)