PythonInterpreter.cxx: change include order to quiet python warnings.

Status Job ID Name Coverage
  External
passed cdash

passed ghostflow-branch-check-master

passed ghostflow-commit-check

running smtk-junction-osx-shared-release+remus

19899:22:04

running smtk-kerbin-windows-shared-release+remus

19900:20:32

running smtk-moho-linux-shared-relwithdebinfo+cgm+matplotlib+remus

19900:57:57

running smtk-moho-linux-shared-relwithdebinfo+cgm+matplotlib+remus+vtk

19900:57:02

running smtk-praxis-windows-shared-release

19900:15:24

running smtk-talosiv-osx-shared-release+cgm+matplotlib

19900:08:38