write session service

[utubun]

Description

1. Using a driver instance (see issue #1 ) create a new session, which accepts following arguments:
   1.1. driver the driver instance for the connection to the database;
   1.2. transaction transaction type (read, write, ...);
   1.3. query a cypher query for the transaction;
2. After the execution, close the session;
3. Return result / error;