[HDFS-3204] Minor modification to JournalProtocol.proto to make it generic - ASF JIRA

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Details

Type: Improvement
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: 2.0.0-alpha
Fix Version/s: 2.0.0-alpha
Component/s: namenode
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Description

JournalProtocol.proto uses NamenodeRegistration in methods such as journal() for identifying the source. I want to make it generic so that the method can be called with journal information to identify the journal. I plan to use the protocol also for sync purposes, where the source of the journal can be some thing other than namenode.