tests: harden

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1620196 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6424: Fix test for new default.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1620199 13f79535-47bb-0310-9956-ffa450edef68
tests: raise connection timeout

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1620205 13f79535-47bb-0310-9956-ffa450edef68