implement and test migration from sqlite to storing password in userdir

cmdeploy/src/cmdeploy/tests/plugin.py

@@ -10,7 +10,6 @@ from pathlib import Path
 
 import pytest
 from chatmaild.config import read_config
-from chatmaild.database import Database
 
 conftestdir = Path(__file__).parent
 
@@ -262,12 +261,6 @@ def gencreds(chatmail_config):
     return lambda domain=None: next(gen(domain))
 
 
-@pytest.fixture()
-def db(tmpdir):
-    db_path = tmpdir / "passdb.sqlite"
-    print("database path:", db_path)
-    return Database(db_path)
-
 
 #
 # Delta Chat testplugin re-use