LUCENE-5408: Spatial SerializedDVStrategy

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1568818 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5440: fix bug in FacetComponent

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1568825 13f79535-47bb-0310-9956-ffa450edef68
tests: raise timeout

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1568849 13f79535-47bb-0310-9956-ffa450edef68
 SOLR-5727: LBHttpSolrServer should only retry on Connection exceptions when sending updates. Affects CloudSolrServer. 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1568859 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5448: backport to 4.x.


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SOLR-5739: Sub-shards created by shard splitting have their update log set to buffering mode on restarts

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