Support interactive transactions for 2.6+

[akudiyar]

Problem statement

In Tarntool 2.6+, interactive transactions became available (see https://www.tarantool.io/en/doc/latest/book/box/atomic/#transactional-manager). This opens the door to implementing transaction support in the driver. In-driver transactions will enable transactional support in the Spring Data module.

Requirements

• MVCC support feature depends on Feature Toggling (Implement Tarantool version verification for feature toggling #40)
• References about the implementation of @transactional in Spring:
  • http://akorsa.ru/2016/08/kak-na-samom-dele-rabotaet-transactional-spring/
  • https://docs.spring.io/spring-framework/docs/4.2.x/spring-framework-reference/html/transaction.html
    The implementation must be compatible with @transactional.
• (optional) JDBC transactions and XA transactions support

Transaction implementation in other noSQL DB drivers must be analyzed.

[Totktonada]

I guess you need interactive transactions in iproto to actually support them in a connector.

[bitgorbovsky]

Also, we can look at tarantool/go-tarantool#185 as a possible reference implementation of streams support.