Test for step-into remote async task.
Setup debugger agents..
Pause before stack trace is captured..
Run stepInto with breakOnAsyncCall flag
Call pauseOnAsyncCall
Trigger external async task on another context group
Dump stack trace
boo (target.js:1:18)
call (framework.js:3:2)
(anonymous) (target.js:0:0)
-- remote-task --
store (utils.js:2:25)
foo (source.js:1:13)
(anonymous) (source.js:2:6)
