[test] Initialize and cleanup the test database root folder

This will avoid the docker daemon to create them
and make them belong to it and thus not properly
accessible if the daemon is root.

beat/core/test/__init__.py

@@ -44,6 +44,8 @@ import tempfile
 
 import pkg_resources
 
+from beat.backend.python.test import BBP_DATABASE_ROOT_FOLDER
+
 if sys.platform == "darwin":
     tmp_prefix = tempfile.mkdtemp(
         prefix=__name__, suffix=".tmpdir", dir="/tmp"  # nosec
@@ -56,6 +58,8 @@ else:
     prefix_folder = tempfile.mkdtemp(prefix=__name__, suffix=".prefix")
 
 
+BC_DATABASE_ROOT_FOLDER = "/tmp/beat_core_test"  # nosec
+
 prefix = os.path.join(prefix_folder, "prefix")
 
 DOCKER_NETWORK_TEST_ENABLED = (
@@ -93,6 +97,9 @@ def setup_package():
     for path in prefixes:
         sp.check_call(["rsync", "-arz", path, prefix_folder])
 
+    for path in [BBP_DATABASE_ROOT_FOLDER, BC_DATABASE_ROOT_FOLDER]:
+        os.makedirs(path, exist_ok=True)
+
     if DOCKER_NETWORK_TEST_ENABLED:
         import docker
 
@@ -117,7 +124,8 @@ def teardown_package():
     if os.path.exists(tmp_prefix):
         shutil.rmtree(tmp_prefix)
 
-    shutil.rmtree(prefix_folder)
+    for path in [prefix_folder, BBP_DATABASE_ROOT_FOLDER, BC_DATABASE_ROOT_FOLDER]:
+        shutil.rmtree(path)
 
     if DOCKER_NETWORK_TEST_ENABLED:
         global network