LUCENE-5969: recreate branch for phase 3

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merge trunk

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LUCENE-5969: add 5.10 dv with segment header, CONST optimization, and missingBits ghostbuster

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LUCENE-5969: add tests

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merge trunk

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LUCENE-5969: use sparsebitset to expand sparse encoding to cover more absurd cases

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LUCENE-5969: fix tests

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LUCENE-5969: move old postings back compat to backward-codecs, cleanup PBF related stuff, add segment headers, etc

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LUCENE-5969: correct TODOs

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LUCENE-5969: woops, revert

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LUCENE-5969: correct TODOs

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LUCENE-6013: remove IndexableFieldType.indexed and FieldInfo.indexed (it's redundant with IndexOptions != null)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1633296 13f79535-47bb-0310-9956-ffa450edef68
correct exotic whitespace

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LUCENE-6015: DocIdSetBuilder: Use the sparse set until more than 1/16 of the longs have one bit set.


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1633305 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-6015: Fix TestDocIdSetBuilder.testDense expectations.


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1633309 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5911: Remove cacheing of norms, calculate up front in freeze()

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1633321 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5969: clean up constants

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SOLR-6633

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SOLR-6633

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SOLR-6633 changed package

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