[test][prefix] Make all databases root folder point to a valid location

This will allow the docker tests to more easily setup and
cleanup its content.

While the folder is not used as these databases are generative
only, docker will create it anyway as mounting a non-exisiting
folder will trigger its creation with the daemon ownership
applied.

beat/backend/python/test/__init__.py

@@ -36,3 +36,7 @@
 import pkg_resources
 
 prefix = pkg_resources.resource_filename(__name__, "prefix")
+
+# This variable should be used to generate the appropriate folder when dealing with
+# docker execution.
+BBP_DATABASE_ROOT_FOLDER = "/tmp/beat_backend_python_test"  # nosec

beat/backend/python/test/prefix/databases/crash/1.json

 {
-  "root_folder": "/tmp/foo/bar",
+  "root_folder": "/tmp/beat_backend_python_test",
   "protocols": [
     {
       "name": "protocol",

beat/backend/python/test/prefix/databases/duplicate_key_error/1.json

 {
-    "root_folder": "/tmp/foo/bar",
+    "root_folder": "/tmp/beat_backend_python_test",
     "protocols": [
         {
             "name": "test_duplicate_key",

beat/backend/python/test/prefix/databases/integers_db/1.json

 {
-    "root_folder": "/tmp/path/not/set",
+    "root_folder": "/tmp/beat_backend_python_test",
     "protocols": [
         {
             "name": "double",

beat/backend/python/test/prefix/databases/integers_db/2.json

 {
     "schema_version": 2,
 
-    "root_folder": "/tmp/path/not/set",
+    "root_folder": "/tmp/beat_backend_python_test",
     "protocols": [
         {
             "name": "double",

beat/backend/python/test/prefix/databases/integers_db_env/1.json

 {
-    "root_folder": "/tmp/path/not/set",
+    "root_folder": "/tmp/beat_backend_python_test",
     "environment": {
         "name": "Example databases",
         "version": "1.4.0"

beat/backend/python/test/prefix/databases/integers_db_env/2.json

@@ -4,7 +4,7 @@
         "name": "Example databases",
         "version": "1.4.0"
     },
-    "root_folder": "/tmp/path/not/set",
+    "root_folder": "/tmp/beat_backend_python_test",
     "protocols": [
         {
             "name": "double",

beat/backend/python/test/prefix/databases/python_keyword/1.json

 {
-    "root_folder": "/tmp/path/not/set",
+    "root_folder": "/tmp/beat_backend_python_test",
     "protocols": [
         {
             "name": "keyword",

beat/backend/python/test/prefix/databases/syntax_error/1.json

 {
-  "root_folder": "/tmp/foo/bar",
+  "root_folder": "/tmp/beat_backend_python_test",
   "protocols": [
     {
       "name": "protocol",

beat/backend/python/test/prefix/databases/with_parameters/1.json

 {
-  "root_folder": "/tmp/foo/bar",
+  "root_folder": "/tmp/beat_backend_python_test",
   "protocols": [
     {
       "name": "test_with_parameters",

beat/backend/python/test/prefix/databases/with_parameters/2.json

 {
-    "root_folder": "/tmp/foo/bar",
+    "root_folder": "/tmp/beat_backend_python_test",
     "protocols": [
         {
             "name": "test_with_parameters",