LUCENE-5886: allow precommit to be run with java8. still TODO: we need to be able to actually detect 1.9

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1617959 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5871: one one thread can IW.close at once

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1617961 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6284: Fix NPE in OCP when non-existent sliceId is used for a deleteShard request. (This closes #74)


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1617968 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6347: Fixing CHANGES.txt entry

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1617972 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5882: Add 4.10 docvaluesformat

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1617975 13f79535-47bb-0310-9956-ffa450edef68