PR IGNITE-2552 EvictionPolicies refactored, logic changed

[ALEKSEY KUZNETSOV]

Plz, review my PR :
http://reviews.ignite.apache.org/ignite/review/IGNT-CR-98
or https://github.com/apache/ignite/pull/1545
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*Best Regards,*

*Kuznetsov Aleksey*