Ratingmdl field adjustments, including:

• Rating permissions view, viewany, viewall, rate in dataformfield_ratingmdl_ratingmdl::permissions() are always true.
• No capability checks when displaying the field elements.
• Events for rating created and deleted.
• Interface implementation grading and usingscale.
• Incorrect field class name reference in the field renderer.
• Removing clone permissions.
• Initial acceptance and unit testing.