Swap all calls to TldSpecificLogicProxy.getCreatePrice() to the counterpart in
DomainPricingLogic. Also makes necessary changes for testing to work, including
fake implementations of DomainPricingCustomLogic and
DomainCreateLofwCustomLogic.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=140754334
