SOLR-6609: queryParams not respected for single-stream UpdateRequests

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1630576 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5986: Fix tests and start returning partial results in case of ExitingReaderException

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1630583 13f79535-47bb-0310-9956-ffa450edef68