Fixed HealthyTaskNonShell test on Windows.
Fixed HealthyTaskNonShell test on Windows.

Instead of using `TRUE_COMMAND`, we needed to use `add_arguments` for
each argument to avoid smashing the set of arguments into one string.
That is, we cannot execute `"cmd /c exit 0"`, we have to execute `"cmd"`
with arguments `"cmd", "/c", "exit 0"`.

Review: https://reviews.apache.org/r/58161/

andschwa/mesos,andschwa/mesos,kaysoky/mesos,zmalik/mesos,Gilbert88/mesos,andschwa/mesos,abudnik/mesos,Gilbert88/mesos,zmalik/mesos,gsantovena/mesos,kaysoky/mesos,asamerh4/mesos,gsantovena/mesos,jpeach/mesos,gsantovena/mesos,zmalik/mesos,chhsia0/mesos,craimbert/mesos,dforsyth/mesos,reneploetz/mesos,gsantovena/mesos,reneploetz/mesos,asamerh4/mesos,dforsyth/mesos,craimbert/mesos,zmalik/mesos,verizonlabs/mesos,jpeach/mesos,zmalik/mesos,verizonlabs/mesos,andschwa/mesos,neilconway/mesos,kaysoky/mesos,abudnik/mesos,andschwa/mesos,kaysoky/mesos,neilconway/mesos,asamerh4/mesos,abudnik/mesos,asamerh4/mesos,reneploetz/mesos,neilconway/mesos,gsantovena/mesos,verizonlabs/mesos,chhsia0/mesos,verizonlabs/mesos,jpeach/mesos,chhsia0/mesos,jpeach/mesos,zmalik/mesos,chhsia0/mesos,craimbert/mesos,chhsia0/mesos,verizonlabs/mesos,neilconway/mesos,dforsyth/mesos,kaysoky/mesos,kaysoky/mesos,andschwa/mesos,reneploetz/mesos,jpeach/mesos,kaysoky/mesos,neilconway/mesos,reneploetz/mesos,chhsia0/mesos,craimbert/mesos,zmalik/mesos,abudnik/mesos,asamerh4/mesos,asamerh4/mesos,andschwa/mesos,craimbert/mesos,dforsyth/mesos,Gilbert88/mesos,abudnik/mesos,gsantovena/mesos,dforsyth/mesos,Gilbert88/mesos,verizonlabs/mesos,Gilbert88/mesos,dforsyth/mesos,craimbert/mesos,abudnik/mesos,chhsia0/mesos,verizonlabs/mesos,Gilbert88/mesos,jpeach/mesos,abudnik/mesos,craimbert/mesos,reneploetz/mesos,jpeach/mesos,dforsyth/mesos,gsantovena/mesos,asamerh4/mesos,Gilbert88/mesos,reneploetz/mesos,neilconway/mesos,neilconway/mesos