OAK-1133: Observation listener PLUS
Evaluate trivial filters on instantiation

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1543553 13f79535-47bb-0310-9956-ffa450edef68
OAK-1133: Observation listener PLUS
Pass path to EventIterator explicitly instead of implicitly via the ImmutableTree instances

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1543556 13f79535-47bb-0310-9956-ffa450edef68