Fix segmentation fault in ActionPack tests
Fix segmentation fault in ActionPack tests

Introduced in f6e293e ActionPack tests began sefaulting. I found that it
was the kwargs and the test causing the seg fault was missing the new
default_headers argument.

EmmaB/rails-1,bolek/rails,Sen-Zhang/rails,hanystudy/rails,illacceptanything/illacceptanything,tgxworld/rails,kenta-s/rails,pschambacher/rails,illacceptanything/illacceptanything,marklocklear/rails,yawboakye/rails,gauravtiwari/rails,arunagw/rails,deraru/rails,gavingmiller/rails,kddeisz/rails,yahonda/rails,rbhitchcock/rails,kmayer/rails,gauravtiwari/rails,lcreid/rails,elfassy/rails,printercu/rails,Stellenticket/rails,riseshia/railsguides.kr,kamipo/rails,palkan/rails,Stellenticket/rails,BlakeWilliams/rails,kmcphillips/rails,kmayer/rails,untidy-hair/rails,mohitnatoo/rails,printercu/rails,pvalena/rails,samphilipd/rails,georgeclaghorn/rails,Edouard-chin/rails,sealocal/rails,pschambacher/rails,tijwelch/rails,odedniv/rails,illacceptanything/illacceptanything,gcourtemanche/rails,travisofthenorth/rails,mohitnatoo/rails,mtsmfm/railstest,utilum/rails,Envek/rails,betesh/rails,kirs/rails-1,notapatch/rails,repinel/rails,coreyward/rails,mijoharas/rails,Envek/rails,mathieujobin/reduced-rails-for-travis,ttanimichi/rails,eileencodes/rails,MSP-Greg/rails,Sen-Zhang/rails,aditya-kapoor/rails,starknx/rails,ttanimichi/rails,starknx/rails,ledestin/rails,Vasfed/rails,yahonda/rails,felipecvo/rails,Erol/rails,Vasfed/rails,kddeisz/rails,alecspopa/rails,maicher/rails,koic/rails,joonyou/rails,gavingmiller/rails,MSP-Greg/rails,koic/rails,marklocklear/rails,tjschuck/rails,brchristian/rails,assain/rails,arunagw/rails,jeremy/rails,flanger001/rails,sealocal/rails,rossta/rails,tgxworld/rails,rails/rails,odedniv/rails,illacceptanything/illacceptanything,stefanmb/rails,deraru/rails,gfvcastro/rails,kirs/rails-1,yasslab/railsguides.jp,travisofthenorth/rails,aditya-kapoor/rails,palkan/rails,arjes/rails,alecspopa/rails,schuetzm/rails,untidy-hair/rails,ledestin/rails,samphilipd/rails,illacceptanything/illacceptanything,georgeclaghorn/rails,flanger001/rails,rossta/rails,utilum/rails,ngpestelos/rails,prathamesh-sonpatki/rails,brchristian/rails,MichaelSp/rails,brchristian/rails,88rabbit/newRails,notapatch/rails,xlymian/rails,odedniv/rails,richseviora/rails,mechanicles/rails,ledestin/rails,sealocal/rails,mtsmfm/railstest,88rabbit/newRails,stefanmb/rails,arunagw/rails,betesh/rails,bolek/rails,coreyward/rails,repinel/rails,schuetzm/rails,eileencodes/rails,iainbeeston/rails,BlakeWilliams/rails,bolek/rails,ngpestelos/rails,88rabbit/newRails,flanger001/rails,MichaelSp/rails,printercu/rails,pschambacher/rails,mechanicles/rails,kenta-s/rails,lcreid/rails,kenta-s/rails,printercu/rails,gauravtiwari/rails,assain/rails,rails/rails,mohitnatoo/rails,baerjam/rails,Edouard-chin/rails,vipulnsward/rails,yahonda/rails,bradleypriest/rails,yhirano55/rails,esparta/rails,gfvcastro/rails,BlakeWilliams/rails,amoody2108/TechForJustice,yasslab/railsguides.jp,yawboakye/rails,illacceptanything/illacceptanything,bogdanvlviv/rails,kachick/rails,utilum/rails,aditya-kapoor/rails,betesh/rails,travisofthenorth/rails,assain/rails,prathamesh-sonpatki/rails,mtsmfm/rails,lucasmazza/rails,pvalena/rails,utilum/rails,travisofthenorth/rails,amoody2108/TechForJustice,MSP-Greg/rails,Stellenticket/rails,Vasfed/rails,kmayer/rails,hanystudy/rails,matrinox/rails,mtsmfm/rails,vassilevsky/rails,matrinox/rails,flanger001/rails,illacceptanything/illacceptanything,felipecvo/rails,shioyama/rails,vipulnsward/rails,fabianoleittes/rails,gfvcastro/rails,rafaelfranca/omg-rails,kachick/rails,kmcphillips/rails,matrinox/rails,prathamesh-sonpatki/rails,Erol/rails,Erol/rails,georgeclaghorn/rails,riseshia/railsguides.kr,starknx/rails,Spin42/rails,kmcphillips/rails,Erol/rails,yasslab/railsguides.jp,yahonda/rails,samphilipd/rails,illacceptanything/illacceptanything,mijoharas/rails,lucasmazza/rails,yalab/rails,gcourtemanche/rails,fabianoleittes/rails,rossta/rails,rbhitchcock/rails,vipulnsward/rails,bradleypriest/rails,Spin42/rails,Edouard-chin/rails,vipulnsward/rails,Vasfed/rails,Envek/rails,deraru/rails,EmmaB/rails-1,rbhitchcock/rails,jeremy/rails,maicher/rails,Spin42/rails,arjes/rails,bradleypriest/rails,joonyou/rails,yalab/rails,joonyou/rails,iainbeeston/rails,deraru/rails,notapatch/rails,amoody2108/TechForJustice,Sen-Zhang/rails,kamipo/rails,richseviora/rails,EmmaB/rails-1,fabianoleittes/rails,kaspth/rails,illacceptanything/illacceptanything,yawboakye/rails,kaspth/rails,tijwelch/rails,illacceptanything/illacceptanything,arjes/rails,esparta/rails,tgxworld/rails,prathamesh-sonpatki/rails,mechanicles/rails,marklocklear/rails,xlymian/rails,ngpestelos/rails,koic/rails,riseshia/railsguides.kr,schuetzm/rails,notapatch/rails,esparta/rails,tjschuck/rails,alecspopa/rails,repinel/rails,Stellenticket/rails,pvalena/rails,palkan/rails,repinel/rails,BlakeWilliams/rails,illacceptanything/illacceptanything,kaspth/rails,arunagw/rails,tgxworld/rails,sergey-alekseev/rails,vassilevsky/rails,joonyou/rails,hanystudy/rails,tijwelch/rails,bogdanvlviv/rails,kachick/rails,Envek/rails,richseviora/rails,lucasmazza/rails,sergey-alekseev/rails,tjschuck/rails,betesh/rails,elfassy/rails,mohitnatoo/rails,yawboakye/rails,yalab/rails,lcreid/rails,MichaelSp/rails,xlymian/rails,bogdanvlviv/rails,riseshia/railsguides.kr,sergey-alekseev/rails,illacceptanything/illacceptanything,assain/rails,shioyama/rails,georgeclaghorn/rails,illacceptanything/illacceptanything,tjschuck/rails,vassilevsky/rails,shioyama/rails,fabianoleittes/rails,elfassy/rails,rafaelfranca/omg-rails,yhirano55/rails,kddeisz/rails,shioyama/rails,kirs/rails-1,rails/rails,voray/rails,gcourtemanche/rails,gavingmiller/rails,palkan/rails,baerjam/rails,voray/rails,baerjam/rails,kamipo/rails,voray/rails,untidy-hair/rails,mijoharas/rails,mtsmfm/rails,Edouard-chin/rails,illacceptanything/illacceptanything,mechanicles/rails,mtsmfm/railstest,yasslab/railsguides.jp,schuetzm/rails,eileencodes/rails,rails/rails,illacceptanything/illacceptanything,MSP-Greg/rails,mathieujobin/reduced-rails-for-travis,maicher/rails,kddeisz/rails,pvalena/rails,jeremy/rails,jeremy/rails,yalab/rails,iainbeeston/rails,untidy-hair/rails,yhirano55/rails,ttanimichi/rails,felipecvo/rails,eileencodes/rails,coreyward/rails,mathieujobin/reduced-rails-for-travis,yhirano55/rails,bogdanvlviv/rails,lcreid/rails,rafaelfranca/omg-rails,iainbeeston/rails,baerjam/rails,gfvcastro/rails,kmcphillips/rails,aditya-kapoor/rails,stefanmb/rails,esparta/rails