Migration of CacheSpringStoreSessionListener to ignite-extensions

[Mikhail Petrov]

Igniters, I propose to migrate CacheSpringStoreSessionListener to 
ignite-extensions in the ignite-spring-tx module as part of Spring 
Transactions integration migration. It also helps to
1. Make the ignite-spring module responsible only for parsing XML 
configurations.
2. Reduce the number of dependencies that the ignite-spring module 
relies on to just spring-context.

PRs with the migration - [1] and [2].
Any objections?

[1]  - https://github.com/apache/ignite-extensions/pull/74
[2] -  https://github.com/apache/ignite/pull/9467

--
Mikhail