boilerplate for PHP code of tokenizer

This adds an installation step for PHP code for the tokenizer. The
PHP code is split in two parts. The updateable code is found in
lib-php. The tokenizer installs an additional script in the
project directory which then includes the code from lib-php and
defines all settings that are static to the database. The website
code then always includes the PHP from the project directory.

test/python/dummy_tokenizer.py

@@ -16,7 +16,7 @@ class DummyTokenizer:
         self.analyser_cache = {}
 
 
-    def init_new_db(self, config):
+    def init_new_db(self, *args, **kwargs):
         assert self.init_state == None
         self.init_state = "new"
 

test/python/test_tokenizer_legacy.py

@@ -36,6 +36,7 @@ def test_config(def_config, tmp_path):
 
 @pytest.fixture
 def tokenizer_factory(dsn, tmp_path, monkeypatch, property_table):
+    (tmp_path / 'tokenizer').mkdir()
 
     def _maker():
         return legacy_tokenizer.create(dsn, tmp_path / 'tokenizer')

test/python/test_tools_refresh_setup_website.py

@@ -26,6 +26,7 @@ def test_script(envdir):
 
 def run_website_script(envdir, config):
     config.lib_dir.php = envdir / 'php'
+    config.project_dir = envdir
     refresh.setup_website(envdir, config)
 
     proc = subprocess.run(['/usr/bin/env', 'php', '-Cq',