pom: use custom jglobus2 libraries

changes since rc3:

      [0f8de4f] pom: point to dcache repository
      [3d9f9aa] pom: revert to bc-1.43
      [8388c50] fix string to principal parsing
      [78c7f50] pom: add explicit version numbers for plugins

the official 2.0.5 release missing Paul's serialization fix and 8388c50

Acked-by: Paul Millar
Target: trunk, 2.5
Require-book: no
Require-notes: no