* add get set methods for swap reward indexes
* add get set methods for swap accrual time
* tidy up location of multi periods
* add swap reward periods to params
* add initial legacy types for incentive
* minor refactor of migration code
* add incentive migration for swap params
* minor incentive test refactors
* add math methods to RewardIndexes
* add keeper method to increment global indexes
* add swap keeper to incentive keeper
* indicate if pool shares were found or not
* add accumulator to compute new rewards each block
* accumulate swap rewards globally
* remove unecessary keeper method
* expand doc comments on accumulator methods
* test precision not lost in accumulation
* minor fixes from merge
* rename storeGlobalDelegatorFactor to match others
* fix migration from merge
* fix bug in app setup
* fix accumulation bug when starting with no state
* rename swap files to match others
* add swap accumulation times to genesis
* remove old migration refactor
* minor updates to spec
* add high level description of how rewards work
* organise testing committee gen state
* remove repeated test app initialization
* minor fixes from linter in tests
* move more setup to SetupApp
* split up KeeperTestSuite for each reward type
* simplify KeeperTestSuite
* simplify PayoutKeeperSuite
* simplify DelegatorRewardSuite
* simplify SupplyRewardsSuite
* simplify BorrowRewardsSuite
* simplify USDXRewardsSuite
* add auth genesis builder for easier test setup
* migrate all incentive tests to auth builder
* add incentive genesis builder for easier setup
migrate hard incentive tests
* migrate all tests to incentive builder
* add hard genesis builder
* small tidy ups
* deduplicate initialTime from borrow tests
* deduplicate initialtTime from supply tests
* deduplicate initialTime from usdx and keeper tests
* deduplicate initialTime in delgator tests
* deduplicate genesis time in payout test
* deduplicate test app initialization
* make authGenesisBuilder available for all modules
* remove unused pricefeed setup
* export incentive genesis builder
* remove commented out test cases
* migrate cdp test to new test state builders
* migrate vv payout tests to use new builders
* add SynchronizeHardBorrowReward unit test
* extract calculatReward method
* tidy up unit test for borrow rewards
* add helper method to RewardIndexes
* user helper to extract logic from SyncBorrowReward
* add Get methods to (Multi)RewardIndexes
* replace params.Subspace in keeper to test easier
* add unit tests for usdx minting
* refactor InitializeUSDXMintingClaim
* add unit tests for InitializeHardBorrowRewards
* refactor SynchronizeUSDXMintingReward
* add unit tests for UpdateHardBorrowIndexDenoms
* change rewardSource type to Dec
needed by delegation rewards
* fix typo in test names
* refactor UpdateHardBorrowIndexDenoms
* update genesis test TODO to use auth builder
* add skipped test for bug in usdx sync
* extract common method for calculating rewards
* doc comment tidy
* add unit tests for delegator rewards
* tidy up test files
* remove old TODOs
* reaarrange InitializeHardDelegatorReward
to fit with other init reward functions
* duplicate borrow unit tests to create supply tests
* add tests for syncing with zero rewards per second
* refactor SynchronizeHardDelegatorRewards
* refactor supply rewards in same way as borrow
* fix total delegation calculation bug
* fix new usdx reward bug
* fix new supply/borrow reward bug
* remove working comment
* standardize behaviour when global factors missing
* improve documentation for CalculateRewards
* standardize variable names
* remove panic from calculateSingleReward
* wip
* Tidy up comments
* remove wip comment
