Update templates\samples\tests to use ensure viewstart.cshtml and views directory names are cased appropriately #1559

@pranavkm , could you please review this PR??
@pranavkm In the previous PR, those comments to the individual methods of DispalyFor, Display, DisplayForModel, EditorModel For, and so on.. I didn't remove them from DefaultEditorTemplates and DefaultDisplayTemplates class though..Do you think we should remove the comments from those classes too?