OAK-1717 Concurrent updates of ordered index in cluster may fail

plans completed.
OAK-1717 Concurrent updates of ordered index in cluster may fail

moved the MAX_COST up to the abstract class for reusing
OAK-1717 Concurrent updates of ordered index in cluster may fail

created the Advanced version of the IndexStoreStrategy
OAK-1717 Concurrent updates of ordered index in cluster may fail

trivial some formatting
OAK-1717 Concurrent updates of ordered index in cluster may fail

hooked the strategy.count into the lookup and implemented the
AdvancedIndexStoreStrategy
OAK-1717 Concurrent updates of ordered index in cluster may fail

trivial added a final
OAK-1717 Concurrent updates of ordered index in cluster may fail

Initial stub for the estimatedEntryCount