Tailer.toEnd() may not position on the last queue entry after crash

[alamar]

Related to #1269

tailer.direction(BACKWARDS).toEnd() also seems to use approximate excerpts count and thus may position on second-to-last entry. This will often be used to read the latest entry to determine where to resume writing data, but seems to be unsafe to use.

For some reason, it always seem to happen when cycle roll-over happened while the queue producer was offline.

ChronicleEnterprise/Chronicle-Queue-Enterprise#333 is affected by this issue as well.