tests: tweak timeouts

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1544998 13f79535-47bb-0310-9956-ffa450edef68
boost default zk connect timeout from 15s to 30s

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1545001 13f79535-47bb-0310-9956-ffa450edef68