- In static builds, we don't need to locate plugins. That is now avoided. This
  saves on several unnecessary filesystem accesses which should improve startup
  time on HPC systems.
- Also avoiding setup of sys.path to find ParaView modules when
  PARAVIEW_FREEZE_PYTHON is true. Since ParaView modules will be frozen, we
  don't need to find site-packages. This avoids further more filesystem
  accesses.

Change-Id: Ib208d5c2308f60b5ecead9bc63ad2a95315788c1