uboness 5c9d96211f Extended X-Pack Info API with Features Info
- introduced the "Feature Set" notion - graph, security, monitoring, watcher, these are all feature sets
- each feature set can be:
 - `available` - indicates whether this feature set is available under the current license
 - `enabled` - indicates whether this feature set is enabled (note that the feature set can be enabled, yet unavailable under the current license)
- while at it, cleaned up the main modules of watcher, security, monitoring and graph.

Original commit: elastic/x-pack-elasticsearch@5b3e19fe8c
2016-04-20 14:30:48 -07:00
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