Use commit_message from a resource

Issue #507
Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/trans/models/translation.py

@@ -771,7 +771,7 @@ class Translation(models.Model, URLMixin, PercentMixin, LoggerMixin):
         '''
         Formats commit message based on project configuration.
         '''
-        msg = self.subproject.project.commit_message % {
+        msg = self.subproject.commit_message % {
             'language': self.language_code,
             'language_name': self.language.name,
             'subproject': self.subproject.name,

weblate/trans/tests/test_models.py

@@ -247,18 +247,6 @@ class ProjectTest(RepoTestCase):
 
         appsettings.GIT_ROOT = backup
 
-    def test_validation(self):
-        project = self.create_project()
-        # Correct project
-        project.full_clean()
-        # Invalid commit message
-        project.commit_message = '%(foo)s'
-        self.assertRaisesMessage(
-            ValidationError,
-            'Bad format string',
-            project.full_clean
-        )
-
     def test_acl(self):
         """
         Test for ACL handling.
@@ -496,6 +484,14 @@ class SubProjectTest(RepoTestCase):
         # Correct project
         project.full_clean()
 
+        # Invalid commit message
+        project.commit_message = '%(foo)s'
+        self.assertRaisesMessage(
+            ValidationError,
+            'Bad format string',
+            project.full_clean
+        )
+
         # Invalid mask
         project.filemask = 'foo/x.po'
         self.assertRaisesMessage(