OAK-1892 - OrderedIndexConcurrentClusterIT takes too long

average 17-18% improvements of inserts

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1607362 13f79535-47bb-0310-9956-ffa450edef68
OAK-1938 - make the DB" JDBC Jars are regular dependency that needs to be locally deployed

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1607365 13f79535-47bb-0310-9956-ffa450edef68
OAK-1915 TarMK failover 2.0
 - clarified the max message length a segment message might have, fixed size issue introduced by adding a checksum verification

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1607366 13f79535-47bb-0310-9956-ffa450edef68