bug 898409, 898410

Data + MMS settings customization by SIM MCC/MNC pair.
Unit tests for Data + MMS settings customizations.

r=kaze
Update gaia-ui-tests.json; Merge pull request #1345 from davehunt/fix-initial-state

Fix unit test for initial state after landing page changes
Merge pull request #12000 from nullaus/operator-variant

bug 898409, 898410