OAK-2215: Create default repository in OakRepositoryFactory

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1633088 13f79535-47bb-0310-9956-ffa450edef68
OAK-2216 LIRS cache: improved concurrency when using the cache loader

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1633089 13f79535-47bb-0310-9956-ffa450edef68
OAK-2217: Use daemon threads for scheduled executor service in RepositoryImpl

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1633091 13f79535-47bb-0310-9956-ffa450edef68