* Create bean for extra SimpleSearchQueryConverter
* Need an extra SimpleSearchQueryConverter for the search with join
but this object can be created once.

* Need NamedParameterJdbcTemplate for the search but this
object can be created once

* Removed interface methods which are never used

Created JUnit tests for all cases in retrieveByScimFilterOnlyActive and
verify the existence of LOWER

becaue of refactoring from review