Changes in RaftActor#handleCaptureSnapshotReply

Changes in RaftActor#handleCaptureSnapshotReply

captureSnapshot.getReplicatedToAllIndex() is usually -1 (in fact I
haven't yet been able to come with a test scenario where it isn't) and
we shouldn't reset the behavior's replicatedToAllIndex history when
we snapshot due to memory threshold exceeded. This prevents log trimming
when a lagging follower is caught up via install snapshot. Eventually
log trimming would catch up on subsequent replicates but I don't see a
reason why we should reset it to -1.

Also made a couple other logging changes.

Change-Id: I6b9eafc84455a88c3bc1fc91608fe257c03b4093
Signed-off-by: Tom Pantelis <tpanteli@brocade.com>