Snapshot submission: Streamling wording for success message

This adjusts the recently changed compact snapshot information to be
closer to what it was before, and adds "full" to the full snapshot
message for clarity:

 I [default] Submitted compact snapshots successfully: 5 activity, 2 logs
 I [default] Submitted full snapshot successfully

Note that the compact snapshot message continues to emitted once per
minute, not continuously as in past releases.

output/compact.go

@@ -158,7 +158,7 @@ func submitCompactSnapshot(ctx context.Context, server *state.Server, collection
 					}
 				}
 				if len(details) > 0 {
-					logger.PrintInfo("Compact snapshots submitted: " + details)
+					logger.PrintInfo("Submitted compact snapshots successfully: " + details)
 				}
 				server.CompactLogTime = time.Now().Truncate(time.Minute)
 				server.CompactLogStats = make(map[string]uint8)

output/full.go

@@ -188,7 +188,7 @@ func submitSnapshot(ctx context.Context, server *state.Server, collectionOpts st
 	if len(msg) > 0 && collectionOpts.TestRun {
 		logger.PrintInfo("  %s", msg)
 	} else if !quiet {
-		logger.PrintInfo("Submitted snapshot successfully")
+		logger.PrintInfo("Submitted full snapshot successfully")
 	}
 
 	return nil