Merge all Frontline maps to one que

[Kyarra]

The issue is, currently, you're far more likely to get Shatter queueing for the Roulette because everyone's queuing for Shatter.

I was surprised when on a weekday I got Secure for my roulette instead of shatter. But it was also funny because most of the people in the match never played it before and had no clue what to do.