Masaru Hasegawa 3df2a086d4 Resolve index names in indices_boost
This change allows specifying alias/wildcard expression in indices_boost.
And added another format for specifying indices_boost. It accepts array of index name and boost pair.
If an index is included in multiple aliases/wildcard expressions, the first match will be used.
With new format, old format is marked as deprecated.

Closes #4756
2016-12-11 21:41:49 +09:00
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2016-12-11 21:41:49 +09:00