test: don't spawn child processes in domain test
test: don't spawn child processes in domain test

Make parallel/test-domain-abort-on-uncaught a little easier to debug,
make it execute the tests in the same process instead of each test in
a separate child process.

PR-URL: https://github.com/iojs/io.js/pull/974
Reviewed-By: Chris Dickinson <38a75c4c4f5646d63b752460df745c5b937b7e58@gmail.com>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node