#81 add log path variable in defaults

[blalop]

Requirements

• Filling out the template is required. Any pull request that does not include enough information to be reviewed in a timely manner may be closed at the maintainers' discretion.
• All new code requires tests to ensure against regressions
• Remember to set idealista:develop as base branch;
• Add "idealista/benders" as reviewer

Description of the Change

Define app_log_path in the defaults so no errors arise when defining log paths.

Benefits

More informative defaults, error-prone behaviour corrected.

Possible Drawbacks

N/A

Applicable Issues

#81