FIX: DependencyGraph: Fix cycle detection by reseting the discovered and processed vertices.
FIX: DependencyGraph: Fix cycle detection by reseting the discovered and
processed vertices.

Speed up the detection by starting at all sources first.

151706061/CTK,msmolens/CTK,finetjul/CTK,espakm/CTK,espakm/CTK,laurennlam/CTK,151706061/CTK,Sardge/CTK,lassoan/CTK,SINTEFMedtek/CTK,naucoin/CTK,CJGoch/CTK,Sardge/CTK,naucoin/CTK,SINTEFMedtek/CTK,finetjul/CTK,laurennlam/CTK,SINTEFMedtek/CTK,laurennlam/CTK,danielknorr/CTK,Sardge/CTK,CJGoch/CTK,commontk/CTK,SINTEFMedtek/CTK,lassoan/CTK,jcfr/CTK,commontk/CTK,fedorov/CTK,CJGoch/CTK,SINTEFMedtek/CTK,CJGoch/CTK,pieper/CTK,vovythevov/CTK,danielknorr/CTK,ddao/CTK,151706061/CTK,Heather/CTK,msmolens/CTK,naucoin/CTK,Heather/CTK,mehrtash/CTK,lassoan/CTK,sankhesh/CTK,pieper/CTK,AndreasFetzer/CTK,sankhesh/CTK,151706061/CTK,mehrtash/CTK,AndreasFetzer/CTK,ddao/CTK,151706061/CTK,commontk/CTK,lassoan/CTK,AndreasFetzer/CTK,msmolens/CTK,danielknorr/CTK,mehrtash/CTK,msmolens/CTK,ddao/CTK,espakm/CTK,jcfr/CTK,Heather/CTK,naucoin/CTK,sankhesh/CTK,Sardge/CTK,rkhlebnikov/CTK,rkhlebnikov/CTK,Heather/CTK,commontk/CTK,fedorov/CTK,rkhlebnikov/CTK,AndreasFetzer/CTK,finetjul/CTK,vovythevov/CTK,ddao/CTK,jcfr/CTK,pieper/CTK,vovythevov/CTK,finetjul/CTK,rkhlebnikov/CTK,fedorov/CTK,laurennlam/CTK,pieper/CTK,jcfr/CTK,mehrtash/CTK,vovythevov/CTK,espakm/CTK,sankhesh/CTK,danielknorr/CTK,fedorov/CTK,jcfr/CTK,CJGoch/CTK