Add more probability distribution tests.
Add more probability distribution tests.

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