Replay - automatically search multiple partitions

[mdickey]

Starting with 2.1, you have to search each database partition individually, and manually. Instead, the user should be able to provide (any) date/time range, and automatically figure out and search all the relevant partitions.

[totala]

ReplayService now supports "range=X-Y" (where X=starting-epoch, and Y=ending-epoch) for date/time ranges -- as an alternative to "partition=N" If the range equates to a single partition, all is usual... if the range equates to multiple partitions, they will each be queried asynchronously in most-recent-first order, and result set is built on the fly in a non-blocking manner.

UI needs to be updated to support this new behavior.