Suppress dulwich warnings (#12163)

- Prevent erroneous dulwich warning messages

src/backend/InvenTree/InvenTree/version.py

@@ -55,6 +55,10 @@ try:
     except (KeyError, IndexError):
         logger.warning('INVE-W1: Current branch could not be detected.')
         main_branch = None
+
+    if main_repo is not None:
+        main_repo.close()
+        main_repo = None
 except ImportError:
     logger.warning(
         'INVE-W2: Dulwich module not found, git information will not be available.'

src/backend/InvenTree/plugin/helpers.py

@@ -147,6 +147,7 @@ def get_git_log(path):
                 datetime.datetime.fromtimestamp(commit.author_time).isoformat(),
                 commit.message.decode().split('\n')[0],
             ]
+            repo.close()
         except KeyError:
             logger.debug('No HEAD tag found in git repo at path %s', path)
         except NotGitRepository: