LUCENE-5027: remove DocConsumer.doAfterFlush and other dead code

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1488311 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4858: call ulog.init on core reopen

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1488349 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4858: increase ulog test coverage

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1488365 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4858: svn add missing test class, and remove nocommit that was overriding randomization of updateLog in SolrTestCaseJ4

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1488431 13f79535-47bb-0310-9956-ffa450edef68