Reversioned org.jdom2 from 2.0.6 to 2.0.6.b0001

Reversioned org.jdom2 from 2.0.6 to 2.0.6.b0001

This ensures that people loading the target platform will
receive the correct version of the plug-in. Currently developers
still have old cached versions of the old bundle with version
2.0.6 that the system unwantedly keeps loading while P2 should
be loading the correct file on the web. The only way to prevent
this is to bump the version qualifier stamp to force downloads.

refs #7114

(cherry picked from commit e6d3924163203b6e6061adcef4ead7ad3f8ce2cf)