LUCENE-5987: don't double-wrap AbortingException

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1644072 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6787 API to manage blobs in Solr

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1644095 13f79535-47bb-0310-9956-ffa450edef68