logging requested and achived consistency level (in debug)
jmeter tests repaired to work with persistent impl
Solr pagination handled
if dataset description is null insert empty string to cassandra
Tests are using AlwaysSuccessfulUidHandler now instead of UISHandler mock
throw RecordNotExistsException when no representation entru in Cassandra
Performance tests improved
start search from 0 if threshold param was not specified
reset mock after each test