OAK-1820: Set _lastRev on insert when new node is also commit root

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1594799 13f79535-47bb-0310-9956-ffa450edef68
OAK-1821 - FT expression with * as field should expand to catch all

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1594800 13f79535-47bb-0310-9956-ffa450edef68
OAK-1645 - Route find queries to Mongo secondary in MongoDocumentStore

Updating the docs

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1594808 13f79535-47bb-0310-9956-ffa450edef68
OAK-301 : oak docu

Documenting the supported system properties

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1594809 13f79535-47bb-0310-9956-ffa450edef68