Add RunStringWithConsoleLocals() to vtkPythonInteractiveInterpreter

This method executes python source code in the context of the locals()
dictionary used by the InteractiveConsole instance owned by the
vtkPythonInteractiveInterpreter.

Change-Id: I86e194ebc2efb959570ed0d4b36b8dfb324052c8
Merge topic 'python-interactive-interpreter' into master

99e86323 Add RunStringWithConsoleLocals() to vtkPythonInteractiveInterpreter