update groupbalancer.go and tests

Author: SaiPrasanna9

groupbalancer.go

@@ -59,7 +59,7 @@ func (s int32Slice) Swap(i, j int) {
 	s[i], s[j] = s[j], s[i]
 }
 
-// To sort in reverse order
+// To sort in reverse order.
 func (s int32Slice) Reverse() sort.Interface {
 	return sort.Reverse(s)
 }

groupbalancer_test.go

@@ -2819,7 +2819,6 @@ func Test_stickyBalanceStrategy_Plan_ReassignmentAfterOneConsumerAdded(t *testin
 	verifyPlanIsBalancedAndSticky(t, s, members, plan2, nil)
 }
 
-// // I think this worked below,test passed
 func Test_stickyBalanceStrategy_Plan_SameSubscriptions(t *testing.T) {
 	s := &StickyGroupBalancer{}
 
@@ -2882,7 +2881,6 @@ func Test_stickyBalanceStrategy_Plan_SameSubscriptions(t *testing.T) {
 	verifyPlanIsBalancedAndSticky(t, s, members, plan2, nil)
 }
 
-// test passing
 func Test_stickyBalanceStrategy_Plan_LargeAssignmentWithMultipleConsumersLeaving(t *testing.T) {
 	s := &StickyGroupBalancer{}
 	r := rand.New(rand.NewSource(time.Now().UnixNano()))