SOLR-5171: SOLR Admin gui works in IE9, breaks in IE10. (merge r1515524)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1515525 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5168: test improvements and @Ignore still broken test (merge r1515521)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1515526 13f79535-47bb-0310-9956-ffa450edef68