Fixed bad variable in builder.py. (#857)

* Fixed bad variable in builder.py.

* Roll back style tests to Python 3.9 (#858)

* Roll back style tests to Python 3.10

* Update unittests.yml

* Revert "Roll back style tests to Python 3.9 (#858)" (#859)

This reverts commit 7ad37e9.

* Remove trailing whitespace

---------

Co-authored-by: hwikle-lanl <[email protected]>
Co-authored-by: Hank Wikle <[email protected]>

Author: dmageeLANL

lib/pavilion/builder.py

@@ -252,7 +252,8 @@ def _create_build_hash(self) -> str:
                 hash_obj.update(self._hash_file(full_path))
             elif full_path.is_dir():
                 self._date_dir(full_path)
-                hash_obj.update(self._hash_dir(full_path, exclude=CONFIG_NAMES))
+                hash_obj.update(self._hash_dir(full_path,
+                    exclude=CONFIG_FNAMES))
             else:
                 raise TestBuilderError(
                     "Extra file '{}' must be a regular file or directory."