SOLR-6170: Merge CoreContainer preRegisterInZk and register methods into create method

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1606891 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5771: Remove BBoxStrategy's support for Overlaps because it never actually did work.

This is a partial commit for this issue -- just the BBox portion so as not to interfere with LUCENE-5779.  Trunk only (bbox isn't in 4x yet).

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1606905 13f79535-47bb-0310-9956-ffa450edef68