tests: show details of count mismatch

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1423179 13f79535-47bb-0310-9956-ffa450edef68
tests: _version_ isn't comparable with control

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1423182 13f79535-47bb-0310-9956-ffa450edef68
raise test poll timeout

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1423244 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4205: Maven configuration: upgrade randomizedtesting-runner to v2.0.7

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1423252 13f79535-47bb-0310-9956-ffa450edef68
Initial version of native mmap
Unit test and clone and friends