tapchannel: adjust timing for quit and cancel test

Testing aux signer quit behavior involved building a job queue and then
checking that some portion of the jobs were skipped, and that the last
job was not processed. This led to racy behavior if the job queue was
too short, or the delay after sending a signal was too long. Using a
larger queue and shorter delay reduces the odds of a race here.

tapchannel/auf_leaf_signer_test.go

@@ -49,7 +49,7 @@ var (
 	}
 
 	// sig job batch size when making more that one sig job.
-	numSigJobs = int32(10)
+	numSigJobs = int32(25)
 
 	// Threshold for trying to cancel or quit the aux leaf signer (allow
 	// the signer to complete a third of the batch).
@@ -207,7 +207,6 @@ func TestAuxLeafSignerCancelAndQuit(t *testing.T) {
 		// Another component could have sent the cancel signal; we'll
 		// send that before the quit signal.
 		close(cancelChan)
-		time.Sleep(time.Millisecond)
 
 		// Send the quit signal; jobs at the end of the batch should not
 		// be processed.