SOLR-4617: SolrCore#reload needs to pass the deletion policy to the next  SolrCore through it's constructor rather than setting a field after.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_2@1458894 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-4857: Don't unnecessarily copy stem override map in StemmerOverrideFilter

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_2@1458897 13f79535-47bb-0310-9956-ffa450edef68