[Piglit] Remove GLenum names from tests.

[Brian Paul]

On 12/28/2017 08:57 AM, Fabian Bieler wrote:
> This series replaces hard-coded GLenum names with calls to piglit_get_gl_enum_name.

Nice.  I guess I didn't realise how many tests needed this fix.

>
> Notes:
>
> Some of the removed, hard-coded Glenum names had vendor, ARB, or EXT suffixes where piglit_get_gl_enum_name returns the suffix-less name.
> This means that some subtests are renamed by this series.
>
> In some cases string comparisons of command line arguments and GLenum names are replaced by integer comparison of piglit_get_gl_enum_from_name(cmd_line_arg) and GLenums.
> This is to ensure that future updates to gl.xml don't necessitate updates to all.py.
> However, these tests now abort on unknown command line arguments which were silently ignored, previously. I hope this is acceptable.

As long as we don't have aborts when running tests/all.py I think that's OK.

Reviewed-by: Brian Paul <brianp at vmware.com>