Boaz Leskes 17906ca7d6 Rename MetaData.uuid -> MetaData.clusterUUID and IndexMetaData.uuid-> IndexMetaData.indexUUID
As explained in #11831, we currently have uuid fields on the cluster state, meta data and index metadata. The latter two are persistent across changes are being effectively used as a persistent uuid for this cluster and a persistent uuid for an index. The first (ClusterState.uuid) is ephemeral and changes with every change to the cluster state. This is confusing,

We settled on having the following, new names:

-> ClusterState.uuid -> stateUUID (transient)
-> MetaData.uuid -> clusterUUID (persistent)
-> IndexMetaData.uuid -> indexUUID (persistent).

Closes #11914
Closes #11831
2015-07-13 20:15:54 +02:00
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