MethodRetry requires maximumAttempts Despite Having a Default Value of 0

[bw-abrowne]

Describe the bug
An IllegalArgumentException occurs if maximumAttempts is not passed for an activity's MethodRetry

To Reproduce
Is the issue reproducible?

• Yes

Steps to reproduce the behavior:
Don't pass maximumAttempts; seen when initialIntervalSeconds, backoffCoefficient, maximumIntervalSeconds, and expirationSeconds are all populated.

Expected behavior
The default value of maximumAttempts (0) should be used and an IllegalArgumentException should not be thrown.

Additional context
Additionally, the concepts documentation includes inconsistent parameter names as compared to the Java client