JCR-3628: Embed cause in org.apache.jackrabbit.core.SessionImpl#getNodeByIdentifier while rethrowing IllegalArgumentException (merged 1506877)

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/branches/2.6@1549532 13f79535-47bb-0310-9956-ffa450edef68