CON-861 Load two lazyrail-related in one group with LazyRail

It doesn't seem to be worth it to load it separately for other page types
based on page type ratios and gzipped size of those files
CON-861 fix bindings
CON-861 Formatting
Merge pull request #3298 from Wikia/CON-861

CON-861 Load two lazyrail-related assets in existing groups