Maven configuration: Added test scope dependency to solr-core module on log4j-over-slf4j, to allow ZooKeeperServer to be instantiated from ZkTestServer.
Maven configuration: Added test scope dependency to solr-core module on log4j-over-slf4j, to allow ZooKeeperServer to be instantiated from ZkTestServer.

git-svn-id: 308d55f399f3bd9aa0560a10e81a003040006c48@1328971 13f79535-47bb-0310-9956-ffa450edef68

PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr