Issue Description:

If a client forgets to dispose ksession, cache will be left. It might be unavoidable. However, the cache should not be reused by another new ksession. It means RELIABLE_SESSIONS_COUNTER should keep incrementing even after fail-over. so RELIABLE_SESSIONS_COUNTER has to be store in the cache.

Acceptance Criteria:

RELIABLE_SESSIONS_COUNTER is stored in a cache. After fail-over, a new ksession should not have the same id as previous ksession.