Avoid potential circular class initialization problems.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1512308 13f79535-47bb-0310-9956-ffa450edef68
JENA-505.  Avoid touching the old-world parsers during initialization.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1512331 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch: upstream/trunk