OAK-672: Avoid JCR APIs calling other JCR APIs
- Don't return implementation objects from SessionContext

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1456035 13f79535-47bb-0310-9956-ffa450edef68
OAK-672: Avoid JCR APIs calling other JCR APIs
- SessionContext implements NamePathMapper

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1456036 13f79535-47bb-0310-9956-ffa450edef68