Fix some tests by updating an adapter class reference.

When running StructuredSelectionGeneratorTestWorkbench, all but one of the tests fail with an NPE. This is happening from 'PythonSnippetUtils.getScriptConsoleCodeGeneratorAdapter(selection)' , which is returning null due to an adapter extension that needs to be updated.

Commit 498f321 renamed ""org.python.pydev.dltk.console.codegen.ScriptConsoleCodeGeneratorFactory" -> "org.python.pydev.shared_interactive_console.console.codegen.ScriptConsoleCodeGeneratorFactory" and "org.python.pydev.dltk.console.codegen.IScriptConsoleCodeGenerator" -> "org.python.pydev.shared_interactive_console.console.codegen.IScriptConsoleCodeGenerator" but did not update org.python.pydev/plugin.xml.