TestHelper: Use coverage3
TestHelper: Use coverage3

Since we are dependent on python3, we need to use the coverage3
binary/symlink on some distribution so the tests don't get executed with
python2.

yashLadha/coala,Tanmay28/coala,rresol/coala,NalinG/coala,AdeshAtole/coala,karansingh1559/coala,stevemontana1980/coala,sophiavanvalkenburg/coala,JohnS-01/coala,arjunsinghy96/coala,swatilodha/coala,CruiseDevice/coala,FeodorFitsner/coala,damngamerz/coala,saurabhiiit/coala,SanketDG/coala,sophiavanvalkenburg/coala,ayushin78/coala,scriptnull/coala,swatilodha/coala,coala/coala,refeed/coala,Tanmay28/coala,NiklasMM/coala,Balaji2198/coala,vinc456/coala,AbdealiJK/coala,djkonro/coala,stevemontana1980/coala,sudheesh001/coala,yland/coala,Tanmay28/coala,swatilodha/coala,CruiseDevice/coala,tltuan/coala,mr-karan/coala,impmihai/coala,d6e/coala,scottbelden/coala,svsn2117/coala,arjunsinghy96/coala,FeodorFitsner/coala,karansingh1559/coala,scriptnull/coala,sagark123/coala,tltuan/coala,NiklasMM/coala,coala-analyzer/coala,SambitAcharya/coala,rresol/coala,arafsheikh/coala,scriptnull/coala,andreimacavei/coala,damngamerz/coala,rimacone/testing2,ManjiriBirajdar/coala,aptrishu/coala,netman92/coala,JohnS-01/coala,djkonro/coala,ManjiriBirajdar/coala,impmihai/coala,refeed/coala,Asalle/coala,Shade5/coala,Asnelchristian/coala,jayvdb/coala,sagark123/coala,Nosferatul/coala,sudheesh001/coala,shreyans800755/coala,scottbelden/coala,vinc456/coala,SambitAcharya/coala,yashtrivedi96/coala,kartikeys98/coala,tushar-rishav/coala,sils1297/coala,jayvdb/coala,SambitAcharya/coala,SambitAcharya/coala,Shade5/coala,AdeshAtole/coala,arush0311/coala,Tanmay28/coala,yashLadha/coala,Asalle/coala,tushar-rishav/coala,abhiroyg/coala,scriptnull/coala,yland/coala,shreyans800755/coala,RJ722/coala,Balaji2198/coala,abhiroyg/coala,d6e/coala,mr-karan/coala,dagdaggo/coala,kartikeys98/coala,scriptnull/coala,MariosPanag/coala,tltuan/coala,MattAllmendinger/coala,MariosPanag/coala,incorrectusername/coala,NiklasMM/coala,NalinG/coala,AdeshAtole/coala,MattAllmendinger/coala,lonewolf07/coala,arafsheikh/coala,tushar-rishav/coala,netman92/coala,aptrishu/coala,rresol/coala,lonewolf07/coala,arush0311/coala,AbdealiJK/coala,andreimacavei/coala,Asalle/coala,yashtrivedi96/coala,sophiavanvalkenburg/coala,MattAllmendinger/coala,ManjiriBirajdar/coala,dagdaggo/coala,FeodorFitsner/coala,CruiseDevice/coala,karansingh1559/coala,Tanmay28/coala,Tanmay28/coala,sudheesh001/coala,SambitAcharya/coala,andreimacavei/coala,meetmangukiya/coala,djkonro/coala,coala/coala,coala-analyzer/coala,Tanmay28/coala,SanketDG/coala,incorrectusername/coala,NalinG/coala,Asnelchristian/coala,nemaniarjun/coala,saurabhiiit/coala,ayushin78/coala,NalinG/coala,meetmangukiya/coala,Uran198/coala,Balaji2198/coala,arush0311/coala,aptrishu/coala,arjunsinghy96/coala,stevemontana1980/coala,coala-analyzer/coala,nemaniarjun/coala,yland/coala,Tanmay28/coala,Uran198/coala,rimacone/testing2,abhiroyg/coala,NalinG/coala,dagdaggo/coala,yashtrivedi96/coala,AbdealiJK/coala,JohnS-01/coala,SanketDG/coala,nemaniarjun/coala,saurabhiiit/coala,NalinG/coala,SambitAcharya/coala,RJ722/coala,sagark123/coala,d6e/coala,arafsheikh/coala,meetmangukiya/coala,scottbelden/coala,RJ722/coala,MariosPanag/coala,lonewolf07/coala,incorrectusername/coala,Shade5/coala,mr-karan/coala,Nosferatul/coala,ayushin78/coala,scriptnull/coala,damngamerz/coala,NalinG/coala,sils1297/coala,kartikeys98/coala,Asnelchristian/coala,coala/coala,scriptnull/coala,shreyans800755/coala,vinc456/coala,netman92/coala,rimacone/testing2,Uran198/coala,Nosferatul/coala,sils1297/coala,yashLadha/coala,impmihai/coala,svsn2117/coala,refeed/coala,svsn2117/coala,jayvdb/coala,SambitAcharya/coala