Use UUID as node identifiers in counters instead of IP addresses 
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                 Key: CASSANDRA-1938
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1938
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Sylvain Lebresne
            Assignee: Sylvain Lebresne
             Fix For: 0.8


The use of IP addresses as node identifiers in the partition of a given
counter is fragile. Changes of the node's IP addresses can result in data
loss. This patch proposes to use UUIDs instead.

NOTE: this breaks the on-disk file format (for counters)

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