This primarily adds accessors to EppInput that will be used for flow reporting
logging in FlowReporter. Specifically, it adds:
- Optional<String> getResourceType() -> domain/host/contact
- Optional<String> getSingleTargetId() -> for SingleResourceCommands
And in addition, it adjusts getCommandName() so that it's now named
getCommandType() for better parallelism with the new getResourceType() (since
getResourceName() would be misleading), and it changes the value returned to be
lowercased, again for consistency. This isn't an issue because getCommandName()
isn't actually used anywhere right now (it was formerly used for EPP whitebox
metrics, but no longer due to recent changes there).
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=153851957