Fix static Python modules initialization.

Added a new module in Utilities/PythonInitializer which exposes a C function to
initialize Python modules for static executables. All executables now simply
link against this one and call the initialization function to init Python.

Change-Id: I7366ad82a94ed904b32d230a1fa5679bf083378a
Merge topic 'catalyst_2.0' into next

f4ea983 Fix static Python modules initialization.