Added new test for euler ode solver
Added new test for euler ode solver

* discovered a bug with the classifier
* added an example to test for this

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