* Add accumulators
* Move accumulator back to keeper package
* Add earn specific accumulators
* Move store methods to sub-package
* Move earn accumulator
* Rename accumulator files
* Add store doc comment
* Add earn accumulator tests, panic if accumulator not used with earn claim type
* Update earn accumulator tests to use new methods
* Add staking test for earn accumulator
* Add test for accumulator proportional rewards
* Remove old copy of GetProportionalRewardsPerSecond
* Add test for basic accumulator
* Fix AddIncentiveMultiRewardPeriod replacement
* Deduplicate base earn reward accumulator
* Check errors in tests
* Validate RewardPeriods in Params.Validate()
* Use adapter to fetch earn total shares
* Add bkava handler for earn incentives
* Add bkava accum tests
* Add bkava denoms in index state
* Set storeTimeEquals to default value
* Add supply expected keepers
* Add tests for proportional adjustment
* Add liquid keeper to incentive keeper
* Use weighted reward periods for bkava
* Add liquid keeper to tests
* Add Accumulate override rewards period with deccoins
* Adjust test to handle sub unit coins
* Add liquid keeper to test
* Fix div by zero for proportional rewards
* Update test for actual expected values
* Update expected indexes to be same for different vaults
* Allow no stored time for vaults that have no indexes or state
* Add test for partial bkava deposit
* Add math check to test
* Deterministically iterate over bkava denoms
* Remove unused expected liquid method GetAllDerivativeDenoms