Add some abort() Ajax tests. Verifies that #3984 works.
Add some abort() Ajax tests. Verifies that #3984 works.

gnarf/jquery,rwaldron/jquery,eburgos/jquery,diracdeltas/jquery,sancao2/jquery,jquery/jquery,isaacs/jquery,ilyakharlamov/jquery-xul,demetr84/Jquery,diracdeltas/jquery,quiaro/request-agent,ilyakharlamov/jquery-xul,mislav/jquery,eburgos/jquery,praveen9102/Shazam,scottjehl/jquery,jquery/jquery,chitranshi/jquery,npmcomponent/component-jquery,Karyotyper/jquery,Karyotyper/jquery,isaacs/jquery,sancao2/jquery,fat/jquery,fat/jquery,roytoo/jquery,roytoo/jquery,hoorayimhelping/jquery,diracdeltas/jquery,npmcomponent/component-jquery,gnarf/jquery,sancao2/jquery,rwaldron/jquery,RubyLouvre/jquery,kpozin/jquery-nodom,RubyLouvre/jquery,roytoo/jquery,Karyotyper/jquery,dtjm/jquery,scottjehl/jquery,eburgos/jquery,hoorayimhelping/jquery,jcutrell/jquery,jquery/jquery,chitranshi/jquery,kpozin/jquery-nodom,dtjm/jquery,jcutrell/jquery,demetr84/Jquery,praveen9102/Shazam,mislav/jquery