CONFIG: adjust paraview lib path for 5.5 (issue #793)

  ParaView 5.4 and older:
    - requires lib/paraview-X.X only

  ParaView 5.5:
    - requires lib/
    - does not appear to require lib/paraview-X.X, but retained for simplicity

- Change default version to paraview-5.5.0 for testing purposes