qemu-iotests: Fix FilePaths cleanup

If os.remove() fails to remove one of the paths, for example if the file
was removed by the test, the cleanup loop would exit silently, without
removing the rest of the files.

Fixes: de263986b5dc
Signed-off-by: Nir Soffer <nsoffer@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200828232152.205833-2-nsoffer@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>

tests/qemu-iotests/iotests.py

@@ -468,11 +468,11 @@ class FilePaths:
         return self.paths
 
     def __exit__(self, exc_type, exc_val, exc_tb):
-        try:
-            for path in self.paths:
+        for path in self.paths:
+            try:
                 os.remove(path)
-        except OSError:
-            pass
+            except OSError:
+                pass
         return False
 
 class FilePath(FilePaths):