OAK-1462 - Aggregate Index isn't usable in an osgi environment

Adding testcase for the OSGi integration of LuceneIndexProviderService

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1601854 13f79535-47bb-0310-9956-ffa450edef68
OAK-1822: NodeDocument _modified may go back in time

Mention required MongoDB version in documentation.

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1601868 13f79535-47bb-0310-9956-ffa450edef68