Make work in both Maria and SQLite. Fix tests

synapse/storage/engines/sqlite3.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Copyright 2015 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+class Sqlite3Engine(object):
+    def __init__(self, database_module):
+        self.module = database_module
+
+    def convert_param_style(self, sql):
+        return sql
+
+    def encode_parameter(self, param):
+        return param