Better way to pass properties down to Maven: Append them to command line as real Maven properties, not as sysprops! Maven-Ant-Tasks should have support for that. By that it is now possible to override tests.multiplier, which was not possible before (pom.xml defines it so sysprop is ignored).

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1622743 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5322: core discovery can fail w/NPE and no explanation if a non-readable directory exists

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1622745 13f79535-47bb-0310-9956-ffa450edef68