core: config: fix [environment:default] handling
core: config: fix [environment:default] handling

Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=990518
Change-Id: Iab14facc70580c246b34448e42aa62fbd8e1273d
Signed-off-by: Alon Bar-Lev <2e3ceb4d37adc6ae3ccc00d3646e0e0a036ace03@redhat.com>

alonbl/otopi,alonbl/otopi,alonbl/otopi