defined? => task_defined? Make tests more quiet. Removed remaining Sys reference.
defined? => task_defined?
Make tests more quiet.
Removed remaining Sys reference.


git-svn-id: 6a2c20c72ceedae27ecedb68e90cd4f115192a7a@88 5af023f1-ac1a-0410-98d6-829a145c37ef

zzak/rake,bentley/rake,envato/rake,askl56/rake,ruby/rake,mat/rake,Vanzct/rake,utilum/rake,esasse/rake,hsbt/rake,envato/rake,pivotalforks/rake,mat/rake,codedogfish/rake,hsbt/rake,jaustinhughey/rake,taiganakagawa/rake,ruby/rake,tmornini/rake,88rabbit/rake,pivotalforks/rake,pjump/rake,ipmobiletech/rake