Add 'match' query parameter for index page

[okurz]

Related progress issue: https://progress.opensuse.org/issues/13742

[coveralls]

Coverage increased (+0.01%) to 70.609% when pulling fa2c138 on okurz:feature/filter_index_page into 67abfeb on os-autoinst:master.

[aaannz]

I don't understand why 'match' keyword. Somehow I don't feel to like it.
Why not just use group even for matching?

[okurz]

seems like a good idea, I will try

[Martchus]

@aaannz Using the group for matching would make filtering for the particular group opensuse difficult if there are two groups opensuse and opensuse test.

[aaannz]

I'm aware of that and I'm not sure if it is a big deal. For exact matches is should be possible to add $ at the and of the match :)

From my POV, I would rather have to put $ at the end of the match than extra match query option.

[Martchus]

Ok, that sounds easy enough.