Added a utils module in the tests package to collect the commonly used functions

The first ones will be the functions used for the setup and teardown of the datasource based tests

tests/utils.py

@@ -0,0 +1,14 @@
+from plugins.mongodb_datasource.utils import connection
+
+
+def datasource_tests_init(conn_args):
+    conn = connection(host=conn_args['host'],
+                      port=conn_args['port'],
+                      username=conn_args['username'],
+                      password=conn_args['password'])
+    database = conn[conn_args['db_name']]
+    return (conn, database)
+
+
+def datasource_tests_clean(conn, dbname):
+    conn.drop_database(dbname)