Revert commit for LOG4J2-734 JDBC batch updates.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1612984 13f79535-47bb-0310-9956-ffa450edef68
Change parent pom of log4j-bom to use generic Apache parent pom. Fixes LOG4J2-735 and LOG4J2-736.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1612986 13f79535-47bb-0310-9956-ffa450edef68