SLING-3916 - Add simple query support to the MongoDBResourceProvider

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1623664 13f79535-47bb-0310-9956-ffa450edef68
SLING-3912 add more content (used Sling features)

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1623665 13f79535-47bb-0310-9956-ffa450edef68