Intent of TestBackoffCoefficient

All 7 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 7 tests
- server/ 7 tests
  - common/ 7 tests
    
    backoff/ 7 tests
    
    TestRetryPolicySuite/ 7 tests
    
    go.temporal.io/server/common/backoff/TestRetryPolicySuite/TestBackoffCoefficient Introduced here
    
    go.temporal.io/server/common/backoff/TestRetryPolicySuite/TestExpirationOverflow Inherited TestExpirationOverflow
    
    go.temporal.io/server/common/backoff/TestRetryPolicySuite/TestExponentialBackoff Inherited TestMaximumInterval, TestExponentialBackoff
    
    go.temporal.io/server/common/backoff/TestRetryPolicySuite/TestMaximumInterval Inherited TestMaximumInterval, TestExponentialBackoff
    
    go.temporal.io/server/common/backoff/TestRetryPolicySuite/TestNoMaxAttempts Inherited TestNoMaxAttempts
    
    go.temporal.io/server/common/backoff/TestRetryPolicySuite/TestNumberOfAttempts Inherited TestNumberOfAttempts
    
    go.temporal.io/server/common/backoff/TestRetryPolicySuite/TestUnbounded Inherited TestUnbounded