* [ios] Fix the layout constraints on iOS 11 for iPhone X for the bottom ornaments.
* WIP adding tests for layout of map view attribution logo and other ornaments
* Rename
* First pass at tests for mapview ornament layout
* Additional code changes from call with Fabian and Jason
* [ios] Fix ornaments insets margin space.
* [ios] Fix map view layout test for pre iOS 11.
* [ios] Refactor MGLMapView ornaments layout constraints for iOS 11.
* [ios] Remove NSLogs from MGLMapViewLayoutTests
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