Add code quality tests concerning exceptions
Add code quality tests concerning exceptions

1) Forbid string exceptions globally (issue 715 related)
 2) Forbid generic exceptions (i.e. 'raise Exception(...)')

rahuldan/sympy,rahuldan/sympy,kaushik94/sympy,MridulS/sympy,garvitr/sympy,jamesblunt/sympy,liangjiaxing/sympy,saurabhjn76/sympy,shikil/sympy,Mitchkoens/sympy,shipci/sympy,madan96/sympy,lidavidm/sympy,Designist/sympy,jerli/sympy,farhaanbukhsh/sympy,kumarkrishna/sympy,sampadsaha5/sympy,souravsingh/sympy,garvitr/sympy,sunny94/temp,amitjamadagni/sympy,cccfran/sympy,cccfran/sympy,wyom/sympy,beni55/sympy,oliverlee/sympy,kaichogami/sympy,dqnykamp/sympy,AunShiLord/sympy,lidavidm/sympy,ChristinaZografou/sympy,moble/sympy,souravsingh/sympy,abhiii5459/sympy,atsao72/sympy,saurabhjn76/sympy,meghana1995/sympy,ga7g08/sympy,sunny94/temp,AkademieOlympia/sympy,ChristinaZografou/sympy,abhiii5459/sympy,pbrady/sympy,pernici/sympy,srjoglekar246/sympy,beni55/sympy,hargup/sympy,hrashk/sympy,debugger22/sympy,wanglongqi/sympy,Sumith1896/sympy,MechCoder/sympy,abloomston/sympy,Titan-C/sympy,AkademieOlympia/sympy,wyom/sympy,wyom/sympy,grevutiu-gabriel/sympy,pandeyadarsh/sympy,MechCoder/sympy,atsao72/sympy,sampadsaha5/sympy,sahilshekhawat/sympy,hrashk/sympy,mcdaniel67/sympy,Arafatk/sympy,kaushik94/sympy,drufat/sympy,chaffra/sympy,aktech/sympy,sampadsaha5/sympy,liangjiaxing/sympy,kaichogami/sympy,mattpap/sympy-polys,ga7g08/sympy,maniteja123/sympy,atreyv/sympy,VaibhavAgarwalVA/sympy,Gadal/sympy,madan96/sympy,minrk/sympy,lidavidm/sympy,moble/sympy,Gadal/sympy,aktech/sympy,cswiercz/sympy,mafiya69/sympy,chaffra/sympy,garvitr/sympy,hazelnusse/sympy-old,sunny94/temp,jerli/sympy,ahhda/sympy,ChristinaZografou/sympy,meghana1995/sympy,yukoba/sympy,atsao72/sympy,sahmed95/sympy,postvakje/sympy,yashsharan/sympy,liangjiaxing/sympy,drufat/sympy,bukzor/sympy,jaimahajan1997/sympy,souravsingh/sympy,Shaswat27/sympy,MridulS/sympy,jamesblunt/sympy,meghana1995/sympy,mcdaniel67/sympy,jamesblunt/sympy,kumarkrishna/sympy,shikil/sympy,mafiya69/sympy,flacjacket/sympy,saurabhjn76/sympy,pandeyadarsh/sympy,kaichogami/sympy,yukoba/sympy,amitjamadagni/sympy,maniteja123/sympy,lindsayad/sympy,iamutkarshtiwari/sympy,iamutkarshtiwari/sympy,skidzo/sympy,Davidjohnwilson/sympy,emon10005/sympy,AunShiLord/sympy,abloomston/sympy,Gadal/sympy,Vishluck/sympy,bukzor/sympy,Arafatk/sympy,Curious72/sympy,hargup/sympy,yukoba/sympy,moble/sympy,yashsharan/sympy,MridulS/sympy,kmacinnis/sympy,jbaayen/sympy,ryanGT/sympy,vipulroxx/sympy,lindsayad/sympy,vipulroxx/sympy,asm666/sympy,Mitchkoens/sympy,kumarkrishna/sympy,kaushik94/sympy,jbbskinny/sympy,ga7g08/sympy,kevalds51/sympy,hargup/sympy,skidzo/sympy,abloomston/sympy,Titan-C/sympy,postvakje/sympy,grevutiu-gabriel/sympy,mafiya69/sympy,madan96/sympy,hrashk/sympy,sahmed95/sympy,vipulroxx/sympy,sahmed95/sympy,dqnykamp/sympy,Vishluck/sympy,kmacinnis/sympy,drufat/sympy,skirpichev/omg,shikil/sympy,hazelnusse/sympy-old,Curious72/sympy,Davidjohnwilson/sympy,fperez/sympy,Davidjohnwilson/sympy,emon10005/sympy,dqnykamp/sympy,postvakje/sympy,asm666/sympy,farhaanbukhsh/sympy,oliverlee/sympy,Designist/sympy,aktech/sympy,VaibhavAgarwalVA/sympy,emon10005/sympy,Arafatk/sympy,jbbskinny/sympy,debugger22/sympy,jaimahajan1997/sympy,toolforger/sympy,MechCoder/sympy,bukzor/sympy,kevalds51/sympy,cswiercz/sympy,cccfran/sympy,jaimahajan1997/sympy,chaffra/sympy,Titan-C/sympy,abhiii5459/sympy,ahhda/sympy,lindsayad/sympy,sahilshekhawat/sympy,cswiercz/sympy,skidzo/sympy,mcdaniel67/sympy,Shaswat27/sympy,Designist/sympy,shipci/sympy,atreyv/sympy,toolforger/sympy,pbrady/sympy,wanglongqi/sympy,farhaanbukhsh/sympy,KevinGoodsell/sympy,Curious72/sympy,maniteja123/sympy,kevalds51/sympy,ahhda/sympy,minrk/sympy,wanglongqi/sympy,shipci/sympy,Vishluck/sympy,beni55/sympy,grevutiu-gabriel/sympy,AunShiLord/sympy,kmacinnis/sympy,debugger22/sympy,rahuldan/sympy,jerli/sympy,Mitchkoens/sympy,atreyv/sympy,jbbskinny/sympy,pbrady/sympy,diofant/diofant,oliverlee/sympy,yashsharan/sympy,VaibhavAgarwalVA/sympy,tovrstra/sympy,Shaswat27/sympy,sahilshekhawat/sympy,asm666/sympy,Sumith1896/sympy,Sumith1896/sympy,iamutkarshtiwari/sympy,pandeyadarsh/sympy,toolforger/sympy,AkademieOlympia/sympy