Avoid excessive listing attempts in the daily sweep (#8081)

Add better dynamic timeouts for locks, also
add jitters before launching daily sweep to ensure
that not all the servers in distributed setup
are not trying to hold locks to begin the sweep
round.

Also, add enough delay for incoming requests based
on totalSetCount*totalDriveCount.

A possible fix for #8071

cmd/background-heal-ops.go

@@ -62,11 +62,11 @@ func (h *healRoutine) run() {
 				break
 			}
 			if globalHTTPServer != nil {
-				// Wait at max 1 minute for an inprogress request
-				// before proceeding to heal
-				waitCount := 60
+				// Wait at max 10 minute for an inprogress request before proceeding to heal
+				waitCount := 600
 				// Any requests in progress, delay the heal.
-				for globalHTTPServer.GetRequestCount() > 2 && waitCount > 0 {
+				for (globalHTTPServer.GetRequestCount() >= int32(globalXLSetCount*globalXLSetDriveCount)) &&
+					waitCount > 0 {
 					waitCount--
 					time.Sleep(1 * time.Second)
 				}