Make Ivarator Seek Threshold Configurable

[apmoriarty]

https://github.com/NationalSecurityAgency/datawave/pull/1142 updated Ivarators to take advantage of a document range when possible. Part of this change introduced the concept of seeking through a field to the specific document id when a threshold was reached.

The default value was set to 40 consecutive hits, but this threshold should be configurable.

[ivakegg]

Setter/getter on ShardQueryLogic which pass through the setter/getter on the config (ShardQueryConfiguration) Add the member to the ShardQueryConfiguration object with setter/getter In the DefaultQueryLogic where the QueryIterator is configured, pass the value through as an iterator option (via the IteratorSetting) In the QueryIterator, pull the value out of the options on the seek method, and pass it through to the IteratorBuildingVisitor In the IteratorBuildingVisitor pass it through to the DatawaveFieldIndexCachingiteratorJexl.