SOLR-4553: for some reason, a node can keep seeing slices inactive or something - we should attempt to proxy inactive slices anyway

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1545027 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4713: This should not be an issue anymore

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1545035 13f79535-47bb-0310-9956-ffa450edef68