Auto merge of #6537 - rwjblue:use-ember-cli-babel-config, r=rwjblue
Auto merge of #6537 - rwjblue:use-ember-cli-babel-config, r=rwjblue

Prevent deprecation from `ember-cli-babel` config options.

Future versions of ember-cli-babel will be moving the location for its own configuration options out of `babel` and will be issuing a deprecation if used in the older way.

This changes things around to detect the correct (undeprecated) options location, and use it when possible.  Otherwise it falls back to `babel` (which is backwards compatible without a deprecation and forwards compatible with a deprecation).

/cc @Turbo87

Reference: https://github.com/babel/ember-cli-babel/pull/105

romulomachado/ember-cli,calderas/ember-cli,pzuraq/ember-cli,seawatts/ember-cli,kellyselden/ember-cli,raycohen/ember-cli,patocallaghan/ember-cli,gfvcastro/ember-cli,HeroicEric/ember-cli,ember-cli/ember-cli,patocallaghan/ember-cli,johanneswuerbach/ember-cli,trentmwillis/ember-cli,elwayman02/ember-cli,rtablada/ember-cli,twokul/ember-cli,kellyselden/ember-cli,Turbo87/ember-cli,buschtoens/ember-cli,sivakumar-kailasam/ember-cli,thoov/ember-cli,buschtoens/ember-cli,mike-north/ember-cli,jgwhite/ember-cli,kanongil/ember-cli,HeroicEric/ember-cli,akatov/ember-cli,asakusuma/ember-cli,romulomachado/ember-cli,romulomachado/ember-cli,kellyselden/ember-cli,johanneswuerbach/ember-cli,ember-cli/ember-cli,cibernox/ember-cli,calderas/ember-cli,asakusuma/ember-cli,gfvcastro/ember-cli,elwayman02/ember-cli,kriswill/ember-cli,pzuraq/ember-cli,seawatts/ember-cli,seawatts/ember-cli,rtablada/ember-cli,pzuraq/ember-cli,HeroicEric/ember-cli,jgwhite/ember-cli,rtablada/ember-cli,trentmwillis/ember-cli,thoov/ember-cli,thoov/ember-cli,kriswill/ember-cli,scalus/ember-cli,twokul/ember-cli,twokul/ember-cli,calderas/ember-cli,kanongil/ember-cli,scalus/ember-cli,ef4/ember-cli,Turbo87/ember-cli,Turbo87/ember-cli,calderas/ember-cli,HeroicEric/ember-cli,raycohen/ember-cli,seawatts/ember-cli,jrjohnson/ember-cli,kategengler/ember-cli,trentmwillis/ember-cli,ef4/ember-cli,johanneswuerbach/ember-cli,scalus/ember-cli,patocallaghan/ember-cli,akatov/ember-cli,romulomachado/ember-cli,Turbo87/ember-cli,akatov/ember-cli,sivakumar-kailasam/ember-cli,scalus/ember-cli,kategengler/ember-cli,thoov/ember-cli,fpauser/ember-cli,fpauser/ember-cli,balinterdi/ember-cli,patocallaghan/ember-cli,akatov/ember-cli,johanneswuerbach/ember-cli,fpauser/ember-cli,rtablada/ember-cli,gfvcastro/ember-cli,sivakumar-kailasam/ember-cli,fpauser/ember-cli,kriswill/ember-cli,cibernox/ember-cli,cibernox/ember-cli,jrjohnson/ember-cli,gfvcastro/ember-cli,ef4/ember-cli,pzuraq/ember-cli,kriswill/ember-cli,kellyselden/ember-cli,mike-north/ember-cli,ef4/ember-cli,kanongil/ember-cli,mike-north/ember-cli,kanongil/ember-cli,ember-cli/ember-cli,mike-north/ember-cli,jgwhite/ember-cli,jgwhite/ember-cli,sivakumar-kailasam/ember-cli,cibernox/ember-cli,balinterdi/ember-cli,twokul/ember-cli,trentmwillis/ember-cli