Fix for LIberty issue #414

In this fix, I attempt to use the methods that just return the classpath urls. I can't regression test against any old Liberties so I have it fallback to the old logic whenever the new logic fails.

• Use SmartClassPath's "getClassPath" to get the classpath URL(s).
• If that doesn't work for some reason, revert to processing individual SmartClassPath elements.
  • Attempt to use "getContainerURLs" on SmartClassPath's elements
  • If that doesn't work, revert to introspection on the "container"
    • Attempt to use "getURls" on the container.
    • If that doesn't work, revert to introspection on the "delegate".