[damned-lies] chore: define LOCK_DIR in test settings

[Claude Paroz <claudep src gnome org>]

commit 824b920f9aa079283298f6aa683d9bfb2466ebcd
Author: Guillaume Bernard <associations guillaume-bernard fr>
Date:   Mon May 3 20:24:52 2021 +0200

    chore: define LOCK_DIR in test settings
    
    On some systems, the default value of LOCK_DIR is unreachable for
    security reasons. Using a temporary and auto-generated directory
    when running tests fixes the issue.

 damnedlies/settings_tests.py | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/damnedlies/settings_tests.py b/damnedlies/settings_tests.py
index 702e3d94..a19dc80a 100644
--- a/damnedlies/settings_tests.py
+++ b/damnedlies/settings_tests.py
@@ -1,3 +1,5 @@
+import tempfile
+
 from .settings import *
 
 SECRET_KEY = 'shRc(?sk+sW3Wqn-lBvs=r52a@#hgC9g'
@@ -5,3 +7,5 @@ SECRET_KEY = 'shRc(?sk+sW3Wqn-lBvs=r52a@#hgC9g'
 SCRATCHDIR = BASE_DIR / 'scratch'
 POTDIR = SCRATCHDIR / 'POT'
 GETTEXT_ITS_DATA = {}
+
+LOCK_DIR = Path(tempfile.mkdtemp())