about retryIntervalMax and retryTimesMax

[stoneshi-yunify]

What would you like to be added:
the arguments:

	retryIntervalMax = flag.Duration("retry-interval-max", 2*time.Minute, "Maximum retry interval of failed deletion.")
	retryTimesMax    = flag.Int("retry-times-max", 10, "Maximum retry times of failed detach volume.")

retryIntervalMax: is this still needed? as the sidecar already have exponential backoff.

retryTimesMax: 10 is too small as default. 100 may be better. And it should allow to completely disable this limits. such as a value of 0 or -1.