Stop hardcoding carrier for some regions (bug 1061716)

This was introduced in 2f67a828 to be more more DRY, but it was wrong in some cases: for instance, it meant your carrier was automatically set to 'deutsche_telekom' if you had an US SIM.

Also took the time to sort the 2 arrays by MCC.
Commit from Mozilla Verbatim by user az.: 326 of 326 strings translated (0 fuzzy).
Merge branch 'master' of github.com:mozilla/fireplace
Merge branch 'master' of github.com:mozilla/fireplace
Fix some wrong carriers/regions, add some carriers etc
Merge branch 'master' of github.com:mozilla/fireplace
Merge branch 'master' of github.com:mozilla/fireplace
make compatibility filtering select prettier (bug 1073278)
tweak dropdown for style guide
remove feed stuff from fabfile
Merge pull request #675 from ngokevin/compat

make compatibility filtering select prettier (bug 1073278)
Merge branch 'master' of github.com:mozilla/fireplace
Commit from Mozilla Verbatim by user benoit.leseul@gmail.com.: 326 of 326 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user theo.chevalier11@gmail.com.: 326 of 326 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user cesperanc@.: 326 of 326 strings translated (0 fuzzy).
Merge pull request #661 from diox/stop-hardcoding-carriers-to-regions

Stop hardcoding carrier for some regions (bug 1061716)