A CurrencyUnit-to-BillingAccountEntry map is persisted in the Registrar entity. It provides flexibility for billing systems that assign different account ids for accounts under different currencies of the same registrar.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=151022753
As part of this change, built out a KeyValueMapParameter from the existing TransitionListParameter in order to enable other Map types in commands (two of which are used in CreateLrpTokensCommand).
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137476564