Fix misleading config in app template
Fix misleading config in app template

Uncommenting the sys.config shell setting in app template rebar.config
works now as expected.

vladdu/rebar3,ferd/rebar3,saleyn/rebar3,rebar/rebar3,tsloughter/rebar3,erlang/rebar3,rebar/rebar3,lrascao/rebar3,djnym/rebar3