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/branches/branch_4x@1617960 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6284: Fix NPE in OCP when non-existent sliceId is used for a deleteShard request. (This closes #74) (Merge from trunk)


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1617970 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6347: Fixing CHANGES.txt entry (Merging from trunk)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1617973 13f79535-47bb-0310-9956-ffa450edef68